Worlds, Systems and Sectors of the Warhammer 40,000 Galaxy

The Garden of Nurgle lies in the warp.

Imperium Nihilus is the portion of the Imperium of Man cut off from Terra’s Astronomican by the Great Rift, which opened at the end of M41.

Imperium Sanctus is the portion of the Imperium of Man on Terra’s side of the Great Rift, still reached by the light of the Astronomican.

Segmentum Obscurus is one of the Imperium’s five Segmentum Majoris, the northern division whose fortress is Cypra Mundi and which contains the Eye of Terror.

Segmentum Pacificus is one of the five major divisions of the Imperium, lying in the west and having its fortress at Hydraphur.

Segmentum Solar is one of the Imperium’s five Segmenta Majoris, the central division containing Terra, its throneworld, and Mars, its fortress-forge world.

Segmentum Tempestus is one of the Imperium of Man’s five Segmentum Majoris, or major divisions, and occupies the southern portion of the Imperial map.

Ultima Segmentum is one of the five Segmentum Majoris of the Imperium of Man, comprising the galaxy’s eastern reaches and the Eastern Fringe.

The Agripinaa Sector is an administrative division of Segmentum Obscurus adjoining the Cadian Gate, centred on the forge world Agripinaa.

The Alaxxes Nebula is a stellar region of dust and ionised gas named in Horus Heresy accounts as the site of the Battle of the Alaxxes Nebula in 007.M31.

The Alduin Sector is a Segmentum Tempestus sector that 40k Orrery uses to group the Gryphonne region, including the Shiola sub-sector and Talos System.

The Aquitaine Sector is a division of the Ultima Segmentum near the galactic core, whose capital, Chemos, was the homeworld of the Emperor’s Children.

The Armageddon Sector is an administrative division of the Segmentum Solar comprising the Armageddon Sub-sector, Voss, Golgotha, Justicar, Paleoth and Desedna.

The Astranii Machine Empire was a region of Segmentum Pacificus encompassing an advanced human civilisation discovered during the Great Crusade.

The Badab Sector is the administrative sector of the Maelstrom Zone associated with the Badab War, and contains Badab Primaris and Archaea/Jahga.

The Bakka Sector is a region of the Segmentum Tempestus centred on the Bakka System, the site of one of the five Segmentum fortresses.

The Belis Corona Sector is a naval sector of the Segmentum Obscurus, centred on the dockyard of Belis Corona near the Eye of Terror.

The Cadian Sector is the Segmentum Obscurus administrative division corresponding to the Cadian Gate and stands above the Cadian Sub-sector.

The Caliban Sector is an administrative sector of the Segmentum Obscurus surrounding Caliban, the destroyed homeworld of the Dark Angels.

The Caligari Sector is a region of the Segmentum Tempestus, lying far from the Astronomican and associated with the game Inquisitor – Martyr.

The Calixis Sector is a frontier region of the Segmentum Obscurus comprising more than two hundred Imperial worlds, with Scintilla as its hive-capital.

The Charadon Sector, known as the Iron Sector of Ultima, is an agricultural and industrial region contested by the Ork empire of Charadon.

The Cicatrix Maledictum, or Great Rift, is a vast tear through realspace and warp that split the galaxy in two after Cadia’s fall.

The Corinth Belt is a grouping of rebellious Imperial worlds in Imperium Nihilus.

The Corribra Sector is a densely populated sector of the Segmentum Tempestus, south-east of Terra, whose Battlefleet is based at the hive world Thesselonia.

The Demeter Sector contains the Pandorax System, and no coordinates are recorded for the sector.

The Elysia Sector is a region of the Segmentum Solar centred on the Elysia System, home of the Elysian Drop Troops.

The Eye of Terror is a vast, permanent rift in real space within Segmentum Obscurus, opening directly onto the warp and the realm of Chaos.

The Farsight Enclaves are the breakaway T’au septs of Commander Farsight on the Eastern Fringe, a Forbidden Zone outside Ethereal rule.

The Fenris Sector is an administrative division of Segmentum Solar centred on Fenris, the death world that is the home of the Space Wolves.

The Formosa Sector is a region of the Segmentum Obscurus on this map, associated with the Nemesis Sub-sector and the Protectorate of Inquisitor Coteaz.

The Forsarr Sector is a region of the Segmentum Tempestus associated with the Raven Guard, including Kiavahr and the moon Deliverance.

The Gildar Rift is a wreck-choked region of the Segmentum Obscurus, near the Silver Skulls-patrolled Storm of the Emperor’s Wrath.

The Gothic Sector is a region of the Segmentum Obscurus and the war zone of Abaddon’s 12th Black Crusade, known as the Gothic War.

The Inwit Cluster, or Inwit System, is a group of closely packed ice worlds in Segmentum Tempestus from which Rogal Dorn ruled a small empire.

The Isstvan Sector is the administrative division containing the Isstvan System, an eight-planet system where the Horus Heresy ceased to be a rumour.

The Karthago Sector is a division of the Ultima Maelstrom Zone whose satrap, Tanit Koenig, began the Badab War.

The Korianis Sector is a Dawn of War location in the Ultima Segmentum that contains Subsector Aurelia, the recruiting region of the Blood Ravens.

The Koronus Expanse is a region of the Halo Stars beyond the Calixis Sector, reached through the Maw and used as a frontier by Rogue Traders.

Kôrynn’s Kindred is a Leagues of Votann Kindred in the galactic core, whose Fane awoke as an Ancestor Core and founded the Kronus Hegemony.

The Kronus Hegemony is a conquest league of the Leagues of Votann in the galactic core, and a region rather than a single planet.

The Lithesh Sector is a subdivision of Ultima containing Kronus and the Kaurava System, the settings of Dawn of War: Dark Crusade and Soulstorm.

The Loki Sector is a region of the Segmentum Tempestus centred on Rynn’s World, home territory of the Crimson Fists.

The Macharian Sector is a Segmentum Pacificus sector named for Lord Solar Macharius and survives as the administrative remnant of the Macharian Crusade.

The Mandragora Sector is a Segmentum Tempestus sector on the Ixaniad border that contains Hecuba and Shaehol, a forge that passed to the Dark Mechanicum.

The Medusan Sector is a sector of the Segmentum Obscurus, regarded as the home region of the Iron Hands and the parent of the Medusan Sub-sector.

The Nachmund Sector is the Gauntlet sector of the Segmentum Obscurus, the administrative level above Nachmund Sub-sector.

The Nem’yar Atoll is a region of frontier Imperial space in the Chalnath Expanse of the Ultima Segmentum, first colonised and fortified by survivors…

The Nephilim Sector is a division of Ultima Segmentum that contains the Pariah Nexus, a Necron-engineered zone of suppressed Warp activity also called the Zone…

The Nostramo Sector is a sunless region of Ultima whose principal world, Nostramo, was the origin of the Night Lords and was destroyed by Konrad Curze.

The Octarius Sector is a region of the Ultima Segmentum and the theatre of the Octarius War between Ork forces and Hive Fleet Leviathan.

Olympia Majoris is the sector-level designation for the mountainous home region of Perturabo, primarch of the Iron Warriors, containing the world of Olympia.

The Sabbat Worlds are a sector of Segmentum Pacificus and the theatre of an Imperial crusade rather than a single world.

The Saganas Belt was a belt of agri-worlds in which, during the Arks of Omen campaign of the early 42nd millennium, a drifting Ark of Omen was discovered.

The Sak’trada Deeps are a region of space recorded as the theatre of a Great Crusade campaign against the Hrud, and as including the Vulpa Straits.

Sanctus Reach is a knight-world star system around the star Sanctus, the setting of Grukk Face-Rippa’s Red Waaagh in the Ultima campaign.

The Scarus Sector is a region of Segmentum Obscurus, best known as the setting of the Eisenhorn case files.

Sector Solar is the administrative sector around Sol, Terra’s own sector, and is distinct from Segmentum Solar, the larger division of which it forms part.

The Sentinel Sector is a quarantined region of the Segmentum Obscurus, near the Eye of Terror, containing the Sentinel Worlds and xenos pylons.

The Stygius Sector is a division of the Segmentum Obscurus centred on the Mordian system, and gives its name to the Stygius War.

The Five Hundred Worlds of Ultramar are a realm of star systems in the Ultima Segmentum, governed by Guilliman within the Imperium of Man.

The Ghost Stars are a region of dying suns and dead human worlds, known in later charts as the Ghoul Stars, catalogued here under Segmentum Obscurus.

The Halo Stars are a sparsely charted region on the outer rim of the Segmentum Obscurus, bordering the Calixis Sector and the Koronus Expanse.

The Pale Stars, formally Mare Stellum Pallidus, the Sea of Pale Stars, or Sea of Pallid Stars, is a collection of systems in the Maelstrom Zone of Ultima…

The Thramas Sector is a region of the Ultima Segmentum, in the Eastern Fringe, where the Thramas Crusade was fought.

The Triplex Sector is a grouping of forges in the Eastern Fringe of the Ultima Segmentum, comprising Triplex Phall, Galatia and Thule.

The Typhon Sector is a named region of the Ultima Segmentum, distinct from the Typhon System, the planet Typhon and the Typhon-Styx Protectorate.

The Typhon-Styx Protectorate is a Leagues of Votann fortress league in the galactic core, separate from Typhon Primaris and the Ghost Stars Typhon.

The Uhulis Sector is an administrative division in Warhammer 40,000 that contains hives, forges and Krieg, the death world that raises the Death Korps.

The Ullanor Sector is a division of the Segmentum Solar centred on Ullanor, the Ork capital that the Emperor and Horus broke in the Ullanor Crusade.

The Viceroy Sector is a region of the Ultima Segmentum that contains the Niaides Sub-sector, whose capital, Maginor, hosted Quixos and the Mystic Path.

The Vidar Sector is a region of the Ultima Segmentum’s Eastern Fringe and the site of the Imperium’s first contact with the Necrons.

The Vorsk Sector is a region of the Segmentum Obscurus, containing the Vorsk Sub-sector and, on this map, the Iron Warriors tithe-world of Castellax.

The Webway is a vast, labyrinthine dimension of interlocking passages constructed by the Aeldari to permit near-instantaneous travel between worlds.

The Western Veil is a region of the T’au Empire once inhabited by the Arachen, an alien species that refused to join the Empire.

The Adrantis Nebula Sub-sector is a subdivision of the Calixis Sector, centred on a gas nebula that spans light-years.

The Aegis Sub-sector is the Eastern Fringe administrative division of the Thramas Crusade, an agricultural region into which Horus sent the Night Lords.

The Agartha Sub-sector is a poorly documented division of the Caligari Sector, in Segmentum Tempestus, containing decaying hives and lethal garden worlds.

The Agripinaa Sub-sector is an industrial region of the Cadian Gate holding the Agripinaa System, the Orb of a Thousand Scars and hive wells such as Amistel.

The Angelus Sub-sector is a division of the Scarus Sector in Warhammer 40,000, nominally administered from the hive-capital Eustis Majoris.

The Armageddon Sub-sector is a Segmentum Solar administrative division containing the Armageddon System and neighbouring worlds.

The Aurus Sub-sector is an administrative division of Segmentum Ultima that contains the Ryza System, a Mechanicus plasma forge.

The Belis Corona Sub-sector is the Obscurus naval-magazine cube that holds the Belis Corona System, a dead-cruiser graveyard and 13th Black Crusade fleet dump…

The Bhein Morr Sub-sector is a Gothic War location in the vicinity of Blackstone I and the Fularis cluster.

The Cadian Sub-sector is an administrative division of the Cadian Sector in Segmentum Obscurus, containing the Cadian System and its sister worlds.

The Caliban Sub-sector is the administrative division around the Caliban System and the home region of the Dark Angels.

The Chinchare Sub-sector is a wandering gravity well associated with the Calixis Sector, dragged by a rogue star and charted within the Obscurus cube.

The Cytheris Sub-sector is the largest sub-sector of the Macharian Sector, containing Persepolis, Macharia, and the Donia Magna well.

The Gethsemane Sub-sector is a division of the Gothic Sector, named for the system where Lord Admiral Ravensburg forced a Chaos fleet to battle in 151.M41.

The Gorandahl Sub-sector is the Imperium Sanctus end of the Nachmund Gauntlet, a production and transport network that became the Sanctus Wall.

The Helican Subsector is a division of the Scarus Sector in Warhammer 40,000, and the setting of the Inquisitors Gregor Eisenhorn and Gideon Ravenor.

The Kallius Subsector was an Imperial subsector whose constituent worlds rose in rebellion during the late 40th millennium.

Lucky Space is a void region of the Scarus Sector, forming part of the setting of the Eisenhorn novels by Dan Abnett.

The Lysades Sub-sector is an administrative division of the Gothic Sector, associated with Schindlegeist, Arimaspia and sites of the Gothic War.

The Malfian Sub-sector is a rimward division of the Calixis Sector, notable for its political intrigue and the hive-world Malfi.

The Mandragora Subsector is a subsector of the Segmentum Tempestus, within the Mandragora Sector, comprising Dread Mandragora, Hecuba and Shaehol.

The Medusan Sub-sector is a region of Segmentum Obscurus containing the Sthenelus System and the waste-world Medusa, the homeland of the Iron Hands.

The Nachmund Sub-sector is the corridor around Vigilus that gives the Nachmund Gauntlet its name and was for a time the only stable crossing of the Great Rift.

The Nemesis Sub-sector is the inner region of the Formosa Sector centred on Nemesis Tessera, an Inquisition fortress-prison close to the Eye of Terror.

The Niaides Sub-sector was a subdivision of the Viceroy Sector; its capital, Maginor, held the Mystic Path and Quixos’s mountain fastness.

The Obolis Sub-sector is an industrial division of the Charadon Sector, centred on the forge well of Metalica.

The Ophidian Sub-sector is a division of the Scarus Sector that Battlefleet Scarus recovered in the Ophidian Campaign, or Purge, of 240–338.M41.

The Orar Sub-sector is a Gothic Sector location, classed as a hive cube, recorded on the map of Abaddon’s 12th Black Crusade.

The Port Maw Sub-sector is the Gothic Sector naval district centred on Port Maw, headquarters of Battlefleet Gothic.

The Prospero Sub-sector is the part of the Ultima cube around the Prospero System, charted on this map as Forzare.

The Sagan Sub-sector is a subdivision of the Karthago Sector whose tithe-world, Sagan III, served as a logistical gateway during the Badab War.

The Sanctus Sub-sector is the Sanctus Reach region of the Ultima Segmentum, a knight-world neighbourhood of Alaric Prime.

The Shiola Sub-sector is the Alduin Sector division that this map uses for the Gryphonne forge, charted as the Talos System.

The Skarskell Subsector is a subsector of Segmentum Ultima.

Subsector Aurelia is a subsector of the Korianis Sector that includes Calderis, Typhon Primaris, Meridian, Cyrene and the frozen capital Aurelia.

Subsector Solar is the inner administrative division of Sector Solar that contains the Sol System, the immediate neighbourhood of Terra.

The Svarteldari Sub-sector is the division of the Fenris Sector that contains the Space Wolves’ home star system.

Tenebra Subsector is a division of the Caligari Sector in Segmentum Tempestus that contains some of the sector’s oldest worlds.

The Ultramar Sub-sector is the charted administrative region in Ultima Segmentum that contains Guilliman’s Five Hundred Worlds of Ultramar.

The Vincies Sub-sector, later known as Lucky Space, is a lost part of the Scarus Sector, once prosperous and now a warp-stormed frontier.

The Vorsk Sub-sector is a region of the Segmentum Obscurus, devastated by Waaagh!

The Voss Sub-sector is a division of the Armageddon Sector centred on Voss, a forge dating from the Horus Heresy era, and is distinct from Voss Prime.

The Wheel of Fire is a region of unstable nebulae and wandering stars, recorded as a subsector of Imperial space also known as Eastern Spiral Subsector 4.

The Zorya Sub-sector is a division of the Vidar Sector, in the Eastern Fringe, that contains Mandragora, the crownworld of the Sautekh Dynasty.

The Accatran System is a star system in Ultima Segmentum, on the Charadon border, whose forge world Accatran fields the Titan legion Legio Destructor.

The Agripinaa System is the principal forge star system of the Cadian Gate, in the Agripinaa Sub-sector, close to the Eye of Terror.

The Alumax System lies in the Charadon Sector.

The Amarah System is the capital star system of the Orpheus Sector, situated in the Capitoline Sub-sector within the Veiled Region.

The Amistel System is a star system in the Agripinaa Sub-sector, Segmentum Obscurus, whose principal world became a battleground of the 13th Black Crusade.

The Angelus System is a system of the Scarus Sector notable chiefly as the site of the world of Eustis Majoris and its associated bodies.

The Anvil 206 System is a naval address in the Orar Sub-sector of the Gothic Sector, known chiefly as the location of Blackstone Fortress II.

The Anvillus System is a Great Crusade-era forge star system in the Ultima Segmentum, comparable to Mars in industrial output.

The Archaea System is a star system in the Badab Sector whose ice moon, Jahga, serves as the base of the Star Phantoms Space Marine Chapter.

The Arimaspia System is an industrial system of the Lysades in the Gothic Sector, notable chiefly for the Chrysalis Shipyards in orbit.

The Armageddon System is a hive-industrial star system in Segmentum Solar, whose principal world, Armageddon, is associated with large-scale land warfare.

The Attila System is a star system in Ultima Segmentum whose steppe world, Attila, supplies the Imperium’s Attilan Rough Riders.

The Aurelian System is the Blood Ravens’ capital star system in Subsector Aurelia, named for the world Aurelia, later displaced into the warp.

The Aviorus System is a star system of the Koronus Expanse, located in The Cauldron, a chart of unnamed worlds on Owlcat’s Rogue Trader void map.

The Baal System is the Blood Angels’ home star system in Ultima Segmentum, comprising irradiated desert worlds around the fortress of Arx Angelicum.

The Badab System is a star system in the Badab Sector of Ultima Segmentum, within the Maelstrom Zone, and the principal setting of the Badab War.

The Bakka System is a young, mineral-rich star system that serves as the naval capital of Segmentum Tempestus.

The Balthar System is a Caligari system in the Tenebra Subsector that was isolated for centuries by a warpsurge and reclaimed through Inquisition missions.

The Baraspine System is a Calixis gravity well in the Adrantis Nebula whose hive world does not rotate, so its population lives at the poles.

The Barbarus System is the lost home star system of the Death Guard, located in Segmentum Tempestus and the place where Mortarion was raised.

The Belis Corona System is a star system in the Belis Corona Sub-sector that serves as a naval munitions magazine for Battlefleet Obscurus.

Beta Garmon is a star system in the Segmentum Solar, the setting of the Titandeath campaign fought on the approaches to Terra during the Horus Heresy.

The Bhein Morr System is a civilised star system in the Gothic Sector that gives its name to the Bhein Morr sub-sector.

The Blackfang system was a star system of twelve worlds held by Orks until 994.M41, its coordinates unrecorded.

The Bonner’s Reach System is a Lucky Space freeport on the old Vincies fringe, at the Scarus edge, treated in lore as a station-outpost.

The Brinaga System, in the Quinrox Sound of the Gothic Sector, is where Blackstone Fortress VI was captured during the 12th Black Crusade.

The Cadian System is the star system of the Cadian Gate, the only fleet-scale corridor out of the Eye of Terror, in Segmentum Obscurus.

The Caliban System is the Dark Angels’ home star system in the Caliban Sub-sector, now consisting chiefly of The Rock and the wreckage of Caliban.

The Callinedes System, a star system of Segmentum Obscurus, was, on the eve of the Horus Heresy around 005.M31.

The Carinae System is a star system with no planets, notable only for the Thousand Moons of Carinae, a cluster of immense void-cities remaining from a power…

The Catachan System is a star system in Ultima Segmentum whose jungle death world, Catachan, is the standard by which other death worlds are compared.

The Chemos System is a former mining star system in the Aquitaine Sector, rebuilt by Fulgrim as a seat of the Emperor’s Children and later lost.

Chinchare is the rogue star of the wandering Chinchare System, a gravitic-storm sun that once lay near the Eye.

The Chinchare System is a mobile Calixis gravity well drawn by a rogue star that formerly lay near the Eye of Terror.

The Chogoris System is the home star system of the White Scars, centred on the steppe world of Chogoris in Mundus Planus.

The Colcha System is an agricultural system in the Segmentum Pacificus, known chiefly for a farmers’ uprising during the Plague of Unbelief.

The Colchis System is a star system in Segmentum Pacificus containing Colchis, the desert homeworld of Lorgar and of the XVII Legion, the Word Bearers.

The Corinth System is an Ultima hive-and-forge star system on the Eastern Fringe whose principal world is Corinthe.

The Corollis Star, also recorded as the Carollis Star, is a star at which the Emperor’s Children under Fulgrim and the Iron Hands defeated the Diasporex fleet…

The Corythos System is a star system in the Segmentum Tempestus whose principal world, Cretacia, is the death-world home of the Flesh Tearers Chapter.

The Cryptus system was a star system that in 998.M41 became the theatre of the Cryptus Campaign against a tendril of Hive Fleet Leviathan.

The Cthonic System is a mined-out star system in Segmentum Solar, close to Terra, in which Horus was found and the world of Cthonia once lay.

The Cygnax System (also spelled Gygnax) is a militarised hive world of the northern Maelstrom Zone, Karthago Sector, lifeless since 577.M41.

The Cypra Mundi System is the forge-world and fleet-capital star system of Segmentum Obscurus, from which Battlefleet Obscurus is directed.

The Cyrene System is a star system in Sub-sector Aurelia, formerly a Blood Ravens recruiting ground, whose world Cyrene was destroyed by Exterminatus.

The Damask System is a star system of the Helican Subsector, within the Scarus Sector, attested in the Eisenhorn cycle of novels by Dan Abnett.

The Damnos System is an ice-mining star system of the Vidar Sector whose principal world, Damnos, was the scene of Ultramarines campaigns against the Necrons.

The Davin System, in the Ultima Segmentum, comprises a feral world and its moon, where Horus was wounded and altered in the Serpent Lodge.

The Diamor System lies in Segmentum Obscurus; no coordinates are recorded for it.

The Donia Magna System is the home system of Lord Solar Macharius, in the Cytheris Sub-sector, and the origin of the Macharian Crusade.

The Drazak System is the Bone Kingdom, a tomb-world gravity well in the Ghoul Stars inhabited by Flayed Ones and ruled by the Necron Valgûl the Fallen Lord.

The Dreah System is a Markayn agricultural system in the Calixis Sector, distinguished by the uniformly grey appearance of its people, crops, sky and water.

The Duralim System lies in the Charadon Sector.

The Eechan System is a Helican location where mutants run carnivals and where Inquisitor Lyko sold psykers.

The Elysia System is a star system in the Elysia Sector, centred on the verdant world of Elysia, homeland of the Elysian Drop Troops.

The Endymion System is the industrial centre and capital system of the Endymion Cluster in the Maelstrom Zone.

The Epsion Octarius System is the Sector Solar system in south-east Segmentum Solar that contains the swamp-and-jungle world of Epsion Octarius.

The Espandor System is a forested cardinal star system on the eastern march of Ultramar, within the Ultramar Sub-sector.

The Estaban System is an Ultima forge well whose two principal forges, Estaban III and Estaban VII, house the Titan legions Tempestor and Magna.

The Eustis System is a hive system of the Angelus Sub-sector in Scarus, serving as an administrative centre for two dozen worlds.

The Farness System is a Cadian Gate star system containing Farness Beta, where Quixos tried to replicate Cadia’s pylons and close the Eye of Terror.

The Fenksworld System is a hive world of the Josian Reach in the Calixis Sector and the site of a Battlefleet Calixis depot.

The Fenris System is the home star system of the Space Wolves, situated in the Svarteldari Sub-sector and centred on the ocean world of Fenris.

The Firestorm System is the industrial home system of the Aurora Chapter, a Second Founding Ultramarines successor, in the Ultima Segmentum.

The Forzare System is another name for the Prospero System, the Prosperan Rift hub containing Magnus’s ruined homeworld and the Planet of the Sorcerers.

Furibundus is a world recorded within the Koronus Expanse, the frontier region beyond Imperial space charted by Rogue Trader dynasties.

The Galaspar System is a star system that contains the hive world Galaspar.

The Galen System is a star system in the Maelstrom Zone that was contested for six years during the Badab War.

The Gamma IV system’s linked space stations and orbital platforms formed one of the Points of Grace targeted during the Angel’s Halo reconquest.

The Gershom System is a star system of the Scarus Sector, attested in fiction associated with the Eisenhorn cycle.

The Gethsemane System is a star system in the Gothic Sector and the namesake of its sub-sector, and the site of a major naval battle of the Gothic War.

The Gildar System is a Silver Skulls-patrolled region of Ultima Segmentum, comprising the Gildar Rift and numbered worlds from Gildar Primus to Septimus.

The Golgotha System is an Ork star system on the north-western rim of the Maelstrom, Ultima Segmentum.

The Gort System is recorded as the site of the mining world of Besana; no segmentum and no coordinates are recorded for it.

The Graia System is the star system of the Graia Sector used by this map, a Tempestus well whose only planet is Equinox.

The Gudrun System is a star system of the Helican Sub-sector in Scarus, containing the declining agri-chemical world Sameter.

The Honourum System is a feral star system in the galactic north of Ultima Segmentum and the location of the Novamarines’ seat, Fortress Novum.

The Hubris System is a Helican system named for colonists who remained after a seventy-year cryogenic voyage placed them on an elliptical orbit.

The Hydra Cordatus System is a forge-world system in the Sentinel Sector, adjacent to the Eye of Terror, that stored Imperial Fists gene-seed.

The Hydraphur System is the fleet-capital star system of Segmentum Pacificus and the base of Battlefleet Pacificus.

The Iax System is a star system in the Ultramar Sub-sector, formerly a fertile agricultural region comparable to Macragge and Konor.

The Ichar System is a hive-and-industrial star system north of Ultramar, centred on its principal world, Ichar IV.

The Idolatros system, situated in the Somnium Stars, was a star system without attested coordinates.

The Iota Horologii system was the location of the Battle of Iota Horologii, fought aboard a number of Jorgall colony-ships.

The Isstvan System is an eight-planet system in Segmentum Ultima where the Horus Heresy became open warfare, at Isstvan III and Isstvan V.

The Jagga System is an Ork freebooter system of the Star Krumpas, formerly known for its moonbison herds and later consumed by a Tyranid hive fleet.

The Jago System is a fortified planet of the Sabbat Worlds on the Pacificus–Tempestus boundary, and the setting of the novel Gaunt’s Jago.

The Jerulas System is a location on the boundary of Segmentum Pacificus and Segmentum Tempestus, associated with the origin of the Land Raider Crusader.

The Jouran System is a star system in the Segmentum Pacificus whose three habitable worlds supply the Jouran Dragoons, a mechanised Imperial Guard regiment.

The Kar Duniash System is a fortress and naval-academy star system of Ultima Segmentum, where Dominator cruisers are built.

The Kastorel System comprises fourteen planets in the Forsarr Sector of Segmentum Tempestus.

The Kaurava System is a star system in the Lithesh Sector of the Ultima Segmentum, contested by nearly every major faction after a warp storm.

The Kiavahr System, in the Forsarr Sector, is the home star system of the Raven Guard and contains the moon Deliverance, site of the Ravenspire.

The Konor System is the northern forge and shipyard system of Ultramar, governed by a Tetrarch and located in the Ultramar Sub-sector.

The Krieg System is a death-world star system in the Uhulis Sector, whose hive world, Krieg, was devastated by nuclear war and produced the Death Korps.

The Krognar System is the star system of the world Krongar, in the Skarskell Subsector of Segmentum Ultima.

The Kulth System is a war zone in the Calixis Spinward Front, contested for eighty years by the Imperium, Orks and the Severan Dominate.

The Landunder System is a hive world of the Malfian Sub-sector whose crust floats on a chemical ocean, with eight cities suspended beneath it.

The Lorn System is a location in Ultima containing Lorn V, a frozen former Exodite world on which the Imperator Titan Dominatus crashed.

The Lucius System is a Mechanicus star system in the Cyclops Cluster of the Gothic Sector, known as the Hollow Forge.

The Lyriax System is a star system in Segmentum Tempestus whose principal named world, Lyriax, is monitored by the Aeldari.

The Macragge System is the capital star system of Ultramar, the Ultramarines’ home system, and the location of the Fortress of Hera.

The Majestis System is a star system in the Segmentum Solar whose principal world, Adrastapol, raised six knight houses.

The Malfian System is a rimward system of the Calixis Sector, containing a hive world of twenty-three billion inhabitants that never became the sector capital.

The Masali System is an agricultural system in Ultramar, where arid worlds hold horticultural domes and water traps that feed the Five Hundred Worlds.

The Medrengard System is the fortress system of Perturabo, primarch of the Iron Warriors, within the Eye of Terror.

The Medusa System is a mining-industrial cluster of worlds in Warhammer 40,000, associated with the Fall of Medusa V in the Ultima campaign.

The Melchior System is a star system in Segmentum Obscurus that was the site of a Great Crusade compliance action involving the Word Bearers and Luna Wolves.

The Meridian System is a hive world in Subsector Aurelia, depicted in Dawn of War II and noted for its continent-hives and the Angel Forge.

The Metalica System is a forge well in the Obolis Sub-sector of the Charadon sector, whose principal world stripped its own biosphere.

The Mezoa System is a volcanic forge in the Gothic Sector, raised from Lucius stock with the assistance of Ferrus Manus and the Emperor.

The Miral System is a death-world system in the Segmentum Tempestus where the Scythes of the Emperor made their last stand after the loss of Sotha.

The Mordian System is a star system in the Stygius Sector whose principal world is tidally locked, with one side scorched and the other in permanent night.

The Morlond System is a fortified Sabbat system that stalled the crusade until Warmaster Macaroth led the assault in person.

The Necromunda System is a Segmentum Solar star system whose principal world, Necromunda, is a hive world of industry and underhive conflict.

The Nemesis System is a wasteland system in the Nemesis Sub-sector, known for the Inquisition dungeon-fortress beneath Nemesis Tessera, near the Eye.

The Nikaea System is a star system in the Segmentum Solar that the Emperor terraformed to host a council of the Legions on the status of psykers.

The Nimbosa System is an Ultima industrial system on the T’au frontier, centred on the world of Nimbosa.

The Nocturne System is the Salamanders’ home system in the Ultima Segmentum, comprising the volcanic death world Nocturne and its moon Prometheus.

The Nuceria System is a star system in Ultima Segmentum, home to the primarch Angron, who was raised as a gladiator on its world of Nuceria.

The Obsidia System is a Chapter fief of the Astral Knights, an Ultima Chapter, that the High Lords later gave to the Sable Swords.

The Octarius System is the Overfiend’s capital gravity well in the Octarius Sector; its principal world is known as Octaria or Octavius.

The Ophelia System is a Tempestus twin-world system of the Ecclesiarchy, comprising the cardinal world Ophelia VII and its sister world, Ophelia VIII.

The Orar System is a hive system in the Gothic Sector, namesake of the Orar Sub-sector and site of an early Imperial success in the 12th Black Crusade.

The Ormeus System is a gravity well in the Agartha Sub-sector of the Caligari Sector, where Webway rifts continue to feed Drukhari slaver raids.

The Pandorax System lies in the Demeter Sector, and no coordinates are recorded for it.

The Paramar System is a depot system in the northern Segmentum Solar, on a stable warp line between Isstvan and Terra.

The Parmenio System is a star system of the Ultramar Sub-sector whose principal world serves as a training centre for the Ultramarines.

The Pavonis System is a mining system in Ultima Segmentum, home to cartel-senates and hive capitals such as Brandon Gate.

The Pech System is a Kroot nest system in Ultima Segmentum, consisting of a jagga-forest gravity well and five charted companion worlds.

The Perditus System is an Imperial planetary system.

The Periremunda System, catalogued under Ultima, has a principal world of eighteen thousand habitable mesas rising above volcanic lowlands.

The Phaedra System contains the memorial world Sabien, with no coordinates or segmentum recorded, and no other worlds of the system named in this account.

The Phall System is the location of the Battle of Phall, a void engagement of 007.M31 between Imperial Fists and Iron Warriors forces.

The Piscina System is a mining system in the Segmentum Obscurus, about six thousand light years east of the Eye of Terror.

The Port Maw System is the Gothic Sector’s naval capital, centred on a hollow artificial planetoid named for its five-hundred-kilometre aperture.

The Praetoria System is a Guard recruiting hive in the Segmentum Tempestus, situated near the naval yards at Bakka.

The Prandium System is an agricultural system of the Ultramar Sub-sector, stripped of its atmosphere by Hive Fleet Behemoth in 745.M41.

The Quaddis System is a Golgenna pleasure well in the Calixis Sector, divided by Faustino Haarlock into noble fiefs.

The Rynnstar System is an agricultural star system in the Loki Sector and the home system of the Crimson Fists Chapter.

The Ryza System is a plasma-forge centre in the Aurus Sub-sector, ranked second only to Mars at the end of the Crusade.

The Sagan System is a tithe well in the Sagan Sub-sector of the Karthago Sector and served as the logistical gateway of the Badab War.

The Sanguis System is a Nachmund system in the Gorandahl Sub-sector; its principal world is Sangua Terra.

The Sarum System is a Dark Mechanicum hell-forge system in the Ultima Segmentum, on the Maelstrom side, that armed the World Eaters during the Horus Heresy.

The Savlar System is a penal system in the Segmentum Solar, a short Warp jump from Armageddon and charted around Savlar Penitens.

The Scintilla System is the capital system of the Calixis Sector in Warhammer 40,000, containing two large hives, a walking city and a gun-foundry town.

The Sigma Pavonis System is a star system in the Ultima Segmentum whose principal world is a Guard medical facility linked to Ciaphas Cain.

Signus Alpha is the red-giant primary star of the Signus Cluster, the location of the Blood Angels’ trap during the Horus Heresy.

Signus Beta is the white-dwarf secondary of the Signus Cluster, a star rather than a mining world or the daemon capital Signus Prime.

Signus Gamma is the blue star of the Signus Cluster, the third sun of a trinary system in which the Blood Angels were trapped during the Horus Heresy.

The Signus System is a cluster of seven industrial worlds in Ultima Segmentum, the site of a trap set for the Blood Angels during the Horus Heresy.

The Sinophia System is a Calixis Periphery system that was formerly the personal fief of Rogue Trader Teresa Sinos and an Angevin staging world.

The Sjantu System is a Jambonium address in Ultima Segmentum, recorded on this chart as the parent location of the hive Badab Primaris.

The Sol System is the Terran star system of Segmentum Solar, the seat of the Imperium and home to Terra and Mars.

The Solomon System is a hive world in the Markayn Marches of the Calixis Sector, serving as a Munitorum seat and an anchor of the Angevin Crusade.

The Sthenelus System is the home star system of the Iron Hands in the Medusan Sub-sector, named after its star, Sthenelus.

The Styxia System is an Imperial star system in the Eastern Fringes of the Ultima Segmentum.

The Talasa System is a star system in Ultramar granted to the Deathwatch; its principal world, Talasa Prime, is the chief training hall and Ordo Xenos keep.

The Talassar System is an Ultramar system marked by a storm-swept ocean world of rock islands and a single continent, Glaudor.

The Tallarn System, in the Segmentum Tempestus, is a desert system whose principal world is Imperial shorthand for the largest tank war in human history.

The Talos System is this map’s designation for the Gryphonne forge system in the Shiola Sub-sector of the Alduin Sector.

The Tanith System is a forested system of the Sabbat Worlds, charted on the Pacificus/Tempestus line, whose principal world grew walking nalwood trees.

The Tarsis Ultra System is an agri-world system in Ultima, named for Roboute Guilliman, that was left a barren rock after the Leviathan battle of 999.M41.

The Tephaine System is a four-world Calixis system on the edge of the Adrantis Nebula, comprising a hive world, two agri-worlds and a pleasure world.

The Thracian Primaris System is the capital system of the Helican Sub-sector and contains Scarus, an industrial world paved in ferrocrete.

The Thramas System, in the Aegis Sub-sector, was the setting of the Thramas Crusade between the Dark Angels and the Night Lords during the Heresy.

The Thrax System is a location in the Calixis Periphery, claimed by the Severan Dominate and named as a map in Only War.

The Tranquility System is an Endymion Cluster gravity well in the Maelstrom Zone that served as a recruiting ground for the Mantis Warriors.

The Typhon System is a jungle system in Subsector Aurelia containing Typhon Primaris, the planet depicted in Dawn of War II.

The Tyran System is an Eastern Fringe system in the Ultima Segmentum that gave the Tyranids their name before a hive fleet consumed it in 745.M41.

The Ullanor System is the Ork capital system of the Ullanor Sector in Segmentum Solar, site of the Emperor’s Triumph and later the War of the Beast.

The Valhallan System, in the Segmentum Ultima, contains Valhalla, a former green colony frozen after an iron comet displaced it from its orbit.

The Varsavia System is the present home of the Silver Skulls Chapter, on the Ultima–Obscurus border near the Gildar Rift.

The Vaxanide System is a hive location in the Malfian Sub-sector, on the Calixis rim, ruled by House Vaxanide from Hive Vaxanhive.

Veridia is the blue-white star of Calth; this location denotes the sun, not the planet itself.

The Veridian System is the Ultramar star system of Calth, whose blue-white sun is lethal to anything remaining on the surface.

The Vigilus System is a star system of the Nachmund Sub-sector and the site of one of the few stable crossings of the Great Rift.

The Vior’la System is a T’au Fire Caste sept in the Ultima Segmentum, centred on a world that orbits a binary star.

The Volistad System is a feudal star system in the Segmentum Tempestus whose principal world the Adeptus Mechanicus terraformed in M35.

The Voss System is the entry for Voss, a Segmentum Solar forge world listed under the Armageddon Sector’s Voss Sub-sector, distinct from Voss Prime.

The Vostroya System is an industrial star system in Segmentum Pacificus, associated with the Vostroyan Firstborn of the Imperial Guard.

The Vraks System is the Scarus armoury well and site of the Siege of Vraks, a three-world gravity well whose only inhabited body was Vraks Prime.

The Vulcanis System is a forge location in the Segmentum Obscurus, centred on Stygies VIII, a moon orbiting a gas giant.

The XCV-104 System is the Ultima survey designation for the system that became Gorkamorka after an Ork hulk struck the Imperial world Angelis.

The Zaramund System lies in Segmentum Obscurus and contains the world Zaramund.

The Zornian System is a star system in Segmentum Solar.

56-Izar was a Saruthi xenos world in the Scarus Sector, recorded under the Vincies Subsector, and is now a dead world.

9 Kappa Mu is a black geodesic sphere, roughly thirty kilometres across, that orbits the sun in the gulf between Terra and Venus.

9836-18 Grave Core is a gas giant in the Ghoul Stars, also called the Ghost Stars.

Accatran is a forge world on the Charadon border, home to the Titan legion Legio Destructor and governed by a rank-ordered society of magi.

Acheron is the world on which the Dawn of War III campaign is set, where Gabriel Angelos, Farseer Macha and Gorgutz contest the Spear of Khaine.

Acrabellar was a shrine world defended during the Angel’s Halo reconquest after it was invaded, in an engagement known as the Battle of Acrabellar.

Acralem is a world in the Darkfall System of the Vidar Sector, Ultima Segmentum.

Adrastapol is a knight world in the Majestis System and the home of the Knights of Adrastapol, whose society was once divided among six noble houses.

Adumbria Prime is a tidally locked civilised world on the Damocles fringe, where the population lives in the twilight Shadow Belt around Skitterfall.

Aeros was a gas giant of the Cryptus system where the Blood Angels 2nd Company fought during the Cryptus Campaign of 998.M41.

Aexe Cardinal is a Sabbat world that did not fully fall to Chaos and endured forty years of trench warfare between two rival states.

Agathon is a hive-and-fortress world in the Coronid Deeps of the Gothic Sector that garrisons more than ten million Imperial Guard.

Aghoru is a Thousand Sons compliance world in Ultima Segmentum, the dry fifth planet catalogued by the 28th Expedition as Twenty-Eight Sixteen.

Agrellan is an Imperial hive that the T’au captured in a single day and renamed Mu’gulath Bay.

Agripinaa is the principal forge world of the Cadian Gate, an Adeptus Mechanicus world close to the Eye of Terror that long supplied arms to Cadia.

Aionos is a moon of the gas giant Kylasma, lying near but not within the Statheros System.

Akum-Sothos is a world of the Akum-Sothos Cluster in the Ultima Segmentum, its exact position uncertain.

Alaitoc is a craftworld of the Aeldari, known among its kin for a strict isolationist creed and for the great number of Rangers it sends out beyond its hull.

Alaric Prime is a knight world in the Sanctus Reach, where two-thirds of the population are held in island prisons around Sacred Isle.

Alfava Metraxis is a world with no recorded segmentum, system, class, or coordinates.

Altansar is an Asuryani craftworld that vanished into the Eye of Terror after the Fall of the Eldar and did not return for nearly ten thousand years.

Amadis is an Imperial world whose liberation’s final battle is recorded, and whose segmentum is not.

Amarah Prime is the capital hive of the Orpheus Sector in Segmentum Tempestus and the anchorage of Battlefleet Orpheus.

Amenthis is a noctilith-rich Necron tomb world in the Maelstrom, in Ultima Segmentum, later recorded as a daemon world heavily corrupted by the warp.

Amethal is an Imperial world in the Diamor System, Segmentum Obscurus; no coordinates are recorded for it.

Amistel is an Agripinaa hive that became a war world and the source of the tithe regiments known as the Amistel Cavalry, including the 24th.

Amity is a daemon world.

Amurav is a world associated with a naval battle in which First Captain Darnath Lysander took part after the opening of the Great Rift.

An’siq is a world within the Sabbat Worlds, a warzone cluster liberated during the Sabbat Worlds Crusade.

Ancreon Sextus is a Sabbat desert world characterised by step-cities, rock labyrinths that Chaos converted into Blood Pact fortresses.

Andante IV is a world with no recorded segmentum, system, or coordinates.

Andraxas is an Imperial world.

Andronicus Prime is a dead forest world in the Andronicus System, Jericho Reach, whose biosphere was destroyed when an unknown vessel shattered its moon.

Anemae Gulfward is a Helican world in Scarus, known chiefly as where Alizebeth Bequin recruited the astropath Tesaera Ungish.

Angelisar is the tropical second world of the Thracian Primaris System, a civilised world later invaded by Death Guard forces.

Angstrom XIII is the outermost world of the Angstrom System in Ultima Segmentum, an unstable volcanic lava world with a trans-volcanic mining station…

Annunciation is a holy Imperial planet on which the Terminus Est bombarded the orbital defences.

Antax is the principal forge world of the Vidar Sector in the Ultima Segmentum, arming hundreds of Imperial Guard regiments and a dozen Space Marine Chapters.

Antecanis IV was a world without attested coordinates, site of the Antecanis Massacre during the Ninth Black Crusade.

Antikef is a Necron tomb world in the Halo Stars and the former crownworld of the Ithakas Dynasty.

Anvil 206 is a system in the Gothic Sector, known chiefly as a naval address and as the site where Blackstone II was found.

Anvillus is a forge from the Crusade era, capable of matching Mars in output, that continues to build Mars-Alpha Warlords.

Anvilus IX (also Anvilus Nine) was a Great Crusade-era forge world known for Land Raider manufacture, including the Proteus pattern.

Aphagia Minor is a Chaos-held mining moon in the Balthar System of the Caligari Sector, an ocean world with abandoned promethium pumps.

Apollonia is a sunless Inquisition moon north of Segmentum Obscurus that served as the reliquary hiding the Athenaeum of Kallimakus.

Arcadia, known also as the Planet of Law, is a hidden Harlequin world situated within the Eye of Terror, in Segmentum Obscurus.

Ardamantua is an Imperial world remembered chiefly as the site of a catastrophic Ork onslaught during the War of the Beast in the early 32nd millennium.

Arden IX is a world of the Imperium on which Fabius Bile raised flesh refineries and cloning vats during the Great Scouring that followed the Horus Heresy.

Arethusa is a starship captained by the rogue trader Sholto Unwerth, employed by Inquisitor Gideon Ravenor’s warband.

Argon Prime is a semitropical hive world in the Balthar System, governed by a military dictatorship that arose from isolation during the Caligari warpsurge.

Argovon is a world named in connection with the Pariah Nexus, the contested northern region where the Necron awakening drew the Adeptus Custodes to war.

Arimaspia is a civilised world of the Lysades, notable chiefly for the Chrysalis Shipyards in orbit above it.

Arios Quintus is the world under the Arios Beacon where Word Bearers and Night Lords allies killed Howling Griffons Chapter Master Orlando Furioso in 220.M38.

Ark Reach Secundus was a world brought into the Imperium late in the Great Crusade.

Arkunasha is a desert world of the T’au Empire, colonised in the Second Sphere of Expansion, whose people live in bio-dome cities along its temperate bands.

Armageddon is a hive world in Segmentum Solar whose name the Imperium uses as shorthand for industrial war.

Armatura was a training world of the Ultramarines Legion within Ultramar, associated with the Shadow Crusade of the Horus Heresy era.

Arthas-Moloch is a dead artefact world on the Eastern Fringe where Commander Farsight found the Dawn Blade among Khornate wreckage.

Ashallon was an industrial world counted among the three Points of Grace targeted during the Angel’s Halo reconquest.

Ashek II is a hive world in the Sabbat Worlds where Heritor Asphodel first fielded woe machines against Marshal Blackwood’s Guard and Titans.

Asphodex was an inhabited world of the Cryptus system in 998.M41, its principal city being Phodia.

Astorgius is an Imperial cardinal world, a world governed by the Ecclesiarchy, the Imperial church, and a war world of the Thaxaril System in the Chalnath…

Asur is a barren pocket-realm moon within the webway, regarded in Aeldari tradition as the site where Asurmen founded the first Aspect shrine after the Fall.

Atari Vo is a T’au colony world that was invaded by the Orks of the Warboss Grog Ironteef.

Athonos is a civilised world of the Segmentum Tempestus whose tithe raises the Athonian Tunnel Rats, Imperial Guard specialists in close-quarters fighting.

Atoma Prime is the desert hive capital of the Moebian Domain in Segmentum Solar and the war-world setting of Darktide.

Attila is a single-continent steppe world inhabited by horse tribes and herds of ovigor, with one city, Khanasan.

Au’taal is a verdant T’au sept of the Second Sphere, designated as a retirement garden for honoured heroes.

Aurelia was the capital of the Aurelian subsector until a warp storm froze its cities and removed the planet from realspace for centuries.

Aurent is a hive world, the sixth planet of the Agripinaa System, in the Agripinaa Sector of Segmentum Obscurus; no galactic coordinates are recorded for it.

Aureus was a human colony in a binary cluster designated Drakonis Three Eleven, governed in the last years of the Great Crusade by the Auretian Technocracy.

Aurum is a feral world in the Orpheus Salient of the Jericho Reach, home to a warrior culture visited by Deathwatch kill-teams in The Emperor Protects.

Avalorn is a world in Segmentum Pacificus brought to compliance during the Great Crusade by the Alpha Legion and the Imperial Fists acting jointly.

Avalus is a world of Imperium Nihilus that became the centre of Lion El’Jonson’s Protectorate after his return in M42.

Avellorn is a hive world in the Segmentum Solar that the Iron Warriors attacked during the Horus Heresy.

Baal is an irradiated desert world in the galactic east, homeworld of the Blood Angels and seat of their fortress-monastery, Arx Angelicum.

Baal Primus, also called Baal Prime or Baalind, is one of the two moons of Baal and a recruiting world of the Blood Angels.

Baal Secundus is an irradiated moon of the Baal system, where Sanguinius fell and was taken in by the tribe known as the Blood.

Badab Primaris is the capital hive world of the Badab Sector, located near the Maelstrom in the Ultima Segmentum.

Badab II, also called Badab Primaris, was the hive capital of the Badab Sector and the seat of the Astral Claws until 912.M41.

Badlanding, also recorded as Bad Landing, is an agricultural colony in the Freiya System of the Loki Sector.

Bairsten Prime is a world contested during the War of the Spider in the Psychic Awakening of M42.

Bakka is the naval base of Segmentum Tempestus, a young mineral world whose surface consists of lava seas and rafts of black rock.

Bakka Triumveron is a yellow-and-violet gas giant in the Bakka System, orbited by fourteen colonised moons.

Balhaut is a world in the Sabbat Worlds, the ten-year objective of Warmaster Slaydo and the site of the battle of 765.M41 that ended his life.

Balthar is a world in the Balthar System of the Caligari Sector, isolated by warpsurge for centuries and found by the Inquisition to be in open heresy.

Balthar’s Eye is an Imperial observation platform in the Balthar System, where tech-savants study Caligari warpsurges at a distance from a Warp protrusion.

Baraspine is an Adrantis hive that is tidally locked and does not rotate, so its inhabitants live at the poles.

Barathred, also spelled Barthred in one account, is a feudal world.

Barbarus was a feral world wreathed in poisonous fog, ruled from its high mountain keeps by xenos Overlords, and the world where the warlord Necare raised…

Basitar is the remains of a daemon world, a world transformed by the warp, in the Pyris Nebula, a region of dust clouds just inside the mouth of the Eye…

Belial IV is a Crone World in the Eye of Terror, formerly an Eldar homeworld drawn into the Warp at the birth of Slaanesh.

Belis Corona is a lifeless world beneath orbital docks that serves as the naval magazine of Segmentum Obscurus.

Belisar is an Imperial hive world, a world dominated by vast enclosed cities, within the Belisar System of the Cadian Sector in Segmentum Obscurus.

Belladon is a planet of the Sabbat Worlds, attested chiefly as a source-world for Astra Militarum forces in Imperial fiction.

Bellerophon’s Fall, also called The Fall, is an industrial moon of the gas giant Crysaor in the Cygnax system.

Bellicas is a tomb world in the Ultima Segmentum and former homeworld of the Emperor’s Swords Chapter, which Necrons destroyed after awakening in late M41.

Belshiir Binary is a Sabbat industrial world that Urlock Gaur seized in 771.M41 after Macaroth’s Cabal advance left the crusade’s supply flank open.

Besana is a desert mining world in the Gort System, worked by the Imperium for cad-ore; no segmentum and no coordinates are recorded for it.

Beseritor is a hive world of the Orpheus Salient in the Jericho Reach and the last major prize of the Achilus Crusade before Hive Fleet Dagon arrived.

Beta Anphelion IV is the fourth moon of the gas giant Beta Anphelion, in the Anphelion System of Segmentum Tempestus.

Bhakhar is a forge world of the Adeptus Mechanicus, its surface given over to manufactoria, ore refineries and the smoke-wreathed habitation blocks…

Bhein Morr is a civilised world in the Gothic Sector and the namesake planet of the Bhein Morr sub-sector.

Bhelik Alphus was a fortress world counted among the Points of Grace targeted during the Angel’s Halo reconquest.

Biel-Tan is the Swordwind craftworld, whose inhabitants are militant restorers of the old Aeldari empire.

The Black Gulf is recorded as the location of the Black Gulf Mines, though no segmentum or coordinates are attested, leaving its place in the galaxy unplaced.

Black Reach is a hive world and the setting of the Assault on Black Reach, in which Ultramarines defeated the Orks of Warboss Zanzag.

Bodt was a volcanic barracks-world of the World Eaters Legion near the galactic core, destroyed by the Iron Hands in 008.M31 during the Horus Heresy.

Bonaventure is an Imperial world of the Helican Sub-sector in Segmentum Obscurus, the birthplace of Alizebeth Bequin and Kara Swole.

Bonner’s Reach was a freeport in Lucky Space, on the former Vincies fringe, used as a dock by Ravenor’s warband.

Bork’an is a First Sphere sept of the T’au Empire, noted for its universities, research facilities, and military academies.

Boros is an Imperial planet in the Ultima Segmentum.

Boros Prime is the principal world of the Boros Gate, a Dark Creed battlefield in the Boros System, Segmentum Obscurus.

Bregundia is a feudal world of the Imperium and a recruiting world of the Dark Angels Space Marine Chapter.

Brigia is a densely populated Imperial world in the Gothic Sector of Segmentum Obscurus, the setting of a siege fought over the loyalty of its own defenders.

Brimlock is a world of the Imperium that raises the Brimlock Dragoons, a regiment of Chimera-borne mechanised infantry.

Brinaga is a world in the Quinrox Sound, the site of the Blackstone VI fortress that Abaddon’s forces captured during the Gothic War.

Bromoch is an Imperial hive world whose surface was once covered by vast oceans teeming with life.

Bront is a hive in the Golgenna Reach of the Calixis Sector and the home of the Brontian Longknives.

Byzas is a feral world of the Imperium, recorded with the tithe grade Aptus Non, exempt from the Imperial tithe.

Cadia is a fortress world on the Cadian Gate, the sole fleet-scale corridor out of the Eye of Terror, held by the Imperium for ten millennia.

Caldera is an Imperial hive world and death world, known to the Great Crusade as One-Five-Four Four.

Calderis is a Korianis feudal desert world in Subsector Aurelia and a recruiting ground of the Blood Ravens Chapter.

Caliban was a forested death world and homeworld of the Dark Angels Legion, shattered when Luther’s rebellion turned it against Lion El’Jonson.

Caligula is a Sabbat hive world where the Tanith First and allied regiments helped to break Nero Hive after a daemonic storm isolated the first assault wave.

Callax, also known as the Gardens of Hell, is a Slaaneshi daemon world in the Ghost Stars and is distinct from the Emperor’s Children homeworld, Chemos.

Callisto is a Galilean moon of Jupiter whose residential orbitals continue to supply aspirants to the Imperial Fists.

Calth is a shipyard world in Ultramar whose blue sun, the Veridian star, has become poisonous and kills any life left on its surface.

The Calth arcologies were subterranean habitation and industrial complexes beneath Calth’s surface, sheltering survivors of the Word Bearers’ assault.

Calva Senoris is an Imperial world in the Narthex Nebula.

Camarth is a heavily forested jungle death world in the Imperium Nihilus, likened in its hostility to ancient Caliban.

Canau is an Imperial world recorded chiefly for its conquest by an Ork invasion force and its subsequent recovery.

Cano’var is a former T’au world that became a Necron tomb world of the Sautekh Dynasty.

Carandiru, penal world of the Imperium, was first brought to compliance by Rogal Dorn during the Great Crusade.

Carnac is a Necron tomb world in the Vidar Sector, inhabited by Eldar Exodites during the Great Sleep and won by Anrakyr the Traveller in 999.M41.

Castellax is a former Iron Warriors fortress-world in Medrengard, left to Orks in the forty-first millennium.

Catachan is a jungle death world, a planet whose biosphere kills colonists, armoured vehicles and, on occasion, Space Marines.

Catallus is a Warp rift in the Ultima Segmentum, site of the Dark Glass station and the Path of Heaven door that Targutai Yesugei opened for the White Scars.

Cephian IV is a world with no recorded segmentum, system, class, or coordinates.

Ceres is a dwarf planet in the inner asteroid belt of the Sol system, between Mars and Jupiter, that serves as a vox-relay and mining-habitat hub.

Cernis IV is the fourth planet of the Cernis System in the Magulanox Sector, formerly an Imperial penal world whose convicts worked promethium refineries…

Ceti Albus is an Imperial world for which no segmentum, sector, system, or coordinates are recorded.

Charadon is an Ork-held world in the Ultima Segmentum and the seat of the galaxy’s largest and most enduring Ork empire.

The Charnel Shrine is a space hulk, a drifting conglomeration of dozens of fused vessels extending over more than twenty cubic kilometres.

Charon is the largest moon of Pluto and one of the inhabited fortress-rocks that ringed the Khthonic Gate.

Charys is a world bound to the warp in a manner that renders its geography unstable and its skies perpetually disordered, regarded by the Space Wolves…

Chemos was a mining world that Fulgrim rebuilt as the homeworld and seat of the Emperor’s Children Legion, destroyed near the end of the Horus Heresy.

Cheraut is a human world of the Cheraut System in the Ultima Segmentum, brought into the Imperium during the Great Crusade after a long and bitter war.

Cheth is an Imperial world in the Segmentum Tempestus, the site of the possession case The Emperor’s Gift, dated to 444.M41.

Chogoris, recorded as Mundus Planus, is the steppe homeworld of the primarch Jaghatai Khan and the White Scars Chapter.

Chondax is an Ultima campaign world of the Horus Heresy on which the White Scars fought Orks, a war the Alpha Legion used to keep Jaghatai from Terra.

Chrysis is the first knight world rediscovered by the Great Crusade, in 850.M30, and belongs to House Krast.

Cinchare is a mining asteroid in the Ghost Stars, associated with Eisenhorn, that follows a figure-eight orbit and yields rare metals.

Cinchare mineworks is a mining installation in the Cinchare system, within the Ghost Stars cluster, as depicted in Dan Abnett’s Eisenhorn novels.

Circe is a ringed gas giant at the edge of the Macragge system.

The City of Dust was a pocket-dimension domain of the Yellow King and a twin of Queen Mab; it answered the gates of Sancour.

Clanar II is a world in Warhammer 40,000 where the daemon Cherubael was worshipped before Inquisitor Quixos bound it into a host.

Clove is a Hazeroth hive in the Calixis Sector that hosts the subsector Arch-Diocese and raises the 23rd Drusus Dragoons.

Cociaminus is a Sabbat world in the Newfound Trailing, contested in successive Imperial campaigns until 773.M41.

The Cociaminus hives are the hive-city complexes of Cociaminus, an industrial world of the Sabbat Worlds noted in the Gaunt’s Ghosts novels.

Cocytus I is the outermost of the twin worlds Cocytus I and Cocytus II, astral bodies at the edge of the Sentinel Sector and the Eye of Terror.

Cocytus II is the twin of Cocytus I.

Coheria is the crystal moon of Port Demesnus, in Segmentum Obscurus, with no system or coordinates recorded.

Colcha is an agricultural world in Pacificus, known chiefly for a farmers’ uprising against occupying forces during the Plague of Unbelief.

Colchis was a desert world of the Warhammer 40,000 setting, three times the size of Terra, and the site of Lorgar’s Covenant theocracy.

Columnus is a forge world of the Segmentum Solar, site of the Battle for Columnus, in which Iron Father Kristos defeated an Ork Waaagh.

Commorragh, the Dark City, is the webway capital of the drukhari, a conglomerate of stolen port-cities ruled through the kabals of Asdrubael Vect.

Commrath is a planet attacked by Eldar of the craftworlds Alaitoc and Iyanden in 888.M41, at a site called Orar’s Sepulchre.

The Conqueror was the flagship of the World Eaters Legion during the Horus Heresy, serving as Angron’s principal command vessel.

Constanix II was a forge world of the Segmentum Pacificus, notable for cities built as colossal barge-vessels that sailed the upper skies rather than standing…

Corday is a world of the Sabbat Worlds, the war-ravaged sector featured in Dan Abnett’s Gaunt’s Ghosts novels.

Corinth is an Imperial world named in accounts of the Corinthian Crusade of 698.M41.

Corinthe is a hive and forge world of the Ultima Segmentum that faced Hive Fleet Moloch in 747.M41.

Corusil V is a world of the Yasan Sector associated with the White Scars’ post-Heresy campaigns against Drukhari raiders.

Crassia II is a world near the Eye of Terror, in Segmentum Obscurus.

Cretacia is a cloud-covered jungle death world in the Corythos System, and the home world of the Flesh Tearers Space Marine Chapter.

Crucible is a hidden Mechanicus outpost within the warp storm Araken, or Tomb of the Ironclad, in the Ghost Stars, as depicted in the novel Iron Hands.

Crucible is the eighth planet of the Gharn System, on the border between the Thramas and Triplex sectors of the Eastern Fringe.

Crucible was a rich Imperial mining world close to the Great Rift, whose population extracted precious minerals and worked promethium refineries.

Cthonia was a mined-out gang world near Terra, known as the place where Horus was found and as a recruiting ground for his Legion.

Cyclothrathe is a world recorded in Adeptus Mechanicus lore and associated with the Dark Mechanicum, the renegade current of the Cult Mechanicus.

Cygnax, also written Gygnax, was a militarised hive world and Imperial lynchpin of the northern Maelstrom Zone until it was left lifeless in 577.M41.

Cypra Chasmis is an unverified location entry in Segmentum Pacificus, distinct from Cypra Mundi, the forge world and fleet capital of Segmentum Obscurus.

Cypra Mundi is the forge world and fleet capital of Segmentum Obscurus, from which Battlefleet Obscurus is directed.

Cyprus Ultima, also called Cyprus Ultra, is an Ultima knight world, the home of House Varlock and a setting in Dawn of War III.

Cyrene was a Blood Ravens recruiting world in Subsector Aurelia, destroyed by Exterminatus after Gabriel Angelos halted its Blood Trials.

D’yanoi, a name meaning “twin moons”, is a T’au twilight world of the First Sphere, locked so that full daylight never arrives.

A daemon world is a planet so eroded by the warp that it becomes an extension of Chaos, ruled by daemons rather than mortals.

Dal’yth is a First Sphere sept of the T’au Empire, consisting of hex-cities and Water Caste markets, and one of the empire’s showpiece colonies.

Damask is a Helican frontier world of ball-tree forests and flint plateaus, where Eisenhorn recovered the Pontius crystal from a Saruthi excavation.

Damnos is an Imperial ice mining world in the Vidar Sector, the site of two Ultramarines campaigns against the Necrons.

Danasar is a world engulfed by the warp storm Fomori some time after the opening of the Great Rift.

Darkhold is the Chapter planet of the Dark Sons, situated on the Nihilus edge of Segmentum Pacificus.

Darkmor is an Imperial shrine world, the site of the Massacre at Darkmor during the Age of the Dark Imperium.

Davin is a feral world where Horus was wounded on its moon and afterwards changed in the Serpent Lodge.

Davin’s moon is the satellite of Davin where Eugen Temba, altered by Nurgle, gravely wounded Horus in an act that Erebus required.

Davin’s moon is a jungle-covered satellite of Davin, noted as the site of Warmaster Horus’s grievous wounding early in the Horus Heresy.

Dawnbreak is a paradise world of the Ultima Segmentum in the Aebrasyn System, and the site of the Slaughter on Dawnbreak.

Deep Orbital DS-191 is a space station in the Callinedes System.

Deimos is a forge world of the Ordo Malleus, formerly the outer moon of Mars, that now orbits Titan and supplies the Grey Knights with arms.

Deliverance is an airless moon of Kiavahr and the fortress-world of the Raven Guard Legion, whose principal stronghold there is the Ravenspire.

Delphyna Three, also called Delphyna III, is a feudal world of the Imperium.

Deluge was a world fought over during the Horus Heresy; no segmentum, system, or coordinates are recorded for it.

Demerium is a cemetery moon of Avarax, an Imperial mausoleum world in the Recidious System, featured in the video game Space Marine 2.

Demiral is an agri-world in the Golgotha Subsector of the Armageddon Sector, separate from the Ork world of Golgotha on the Maelstrom rim.

Dessah is a fortress world on which Typhus’s ships arrived during the same war recorded at the Cadian Gate in M42.

Devlan is an Eastern Fringe mining world in the Ultima Segmentum that Hive Fleet Kraken consumed in 990.M41.

Dharrovar is a Traitor Knight world of House Mandrakor on the Nachmund Gauntlet, whose allegiance changed to Chaos after the Great Rift opened.

Diamat is an Ultima armoury world depicted in Mike Lee’s novel Fallen Angels as a strategic objective during the Horus Heresy.

Dolumar IV is an Imperial colony world in Ultima Segmentum and the setting of the Fire Warrior campaign, which ended in an order of Exterminatus.

Dominicus Prime is the holiest cardinal world of the Caradryad Sector, a shrine planet covered in monasteries in Segmentum Tempestus.

Dragon’s End is a volcanic Knight world held by House Griffith, located near Incaladion.

Dragos is a world given over almost entirely to dense, warp-touched jungle, its canopy concealing ruins, predatory wildlife and pockets of daemonic corruption…

Drashin is an Imperial world for which no segmentum, sector, system, or coordinates are recorded.

Drazak, called the Bone Kingdom, is a Necron tomb world in the Ghoul Stars given over to the Flayed Ones, Necrons afflicted by the Flayer virus.

Dreah is a Markayn agricultural world characterised by the uniformly grey colouring of its inhabitants, crops, sky and water.

Drechia is an Imperial mining world whose galleries and ore-works supported a hinterland economy until Chaos cultists and Eldar raiders made the mines…

Dregrokk is an Ork world in the Damocles Gulf, the capital of the Ork Empire of Alsanta under the Warboss Nazdreg, sharing a system with Arthas Moloch.

Dulan was the throneworld of the Faash during the Great Crusade and was captured by the Imperium at the end of the Dulan Campaign in 870.M30.

Durer was an Ophidian agri-world where Eisenhorn left a Court of Examination to finish the heretic Fayde Thuring, killer of Midas Betancore.

Durga Principe is an Imperial world, described in one account as a cardinal world, a world governed by the Ecclesiarchy.

Dwell is a world of the Horus Heresy, the site of the Battle of Dwell in 008.M31.

Dysactis is a world with no recorded segmentum or coordinates.

Eechan is a carnival world in the Helican Subsector, noted for its mutant pits and for the auction of psykers by Inquisitor Lyko.

El’Phanor was a world without attested coordinates, site of the Grand Citadel of the Kromarch.

Elsy’eir is a densely populated Second Sphere culture sept of the T’au, whose numerous moons supply battlesuit foundries.

Elysia is a verdant, civilised world that supplies the Imperial Guard with Elysian Drop Troops rather than line infantry.

Elysiar is a verdant planet in Modren’s Realm, described in the Rogue Trader module The Twilight Crusade, and is distinct from Elysia.

Elysium IX was the jungle-and-savannah home of the Celestial Lions in Elara’s Veil, overrun by the Exilarchy following the Great Rift.

Enceladus is Saturn’s ice moon, an Ordo Malleus palace-fort distinct from the Segmentum Pacificus world of the same name.

The Endurance was a Death Guard grand cruiser that served as the flagship of First Captain Calas Typhon during the Horus Heresy.

Endymion Prime is the industrial centre of the Endymion Cluster in the Maelstrom Zone and suffered damage in the closing phase of the Badab War.

Enothis is a hive in the Khan Group whose southern Trinity Hives fell to Anakwanar Sek before an air campaign in 774.M41 forced Sek off-world.

The Enothis airfields were a network of Imperial Navy air bases on Enothis, active during the Sabbat Worlds Crusade’s aerial campaign for the world.

Epsilon Octarius is a variant spelling of Epsion Octarius, a Solar swamp world, recorded on this map under the Octarius Sector.

Epsion Octarius is a swamp-and-jungle world in the Segmentum Solar, south of Catachan, that exports ore, food and Crotalids.

Equixus is a sunless hive world of the Ultima Segmentum, the setting of Spurrier’s Lord of the Night and the crash site of the Night Lord Zso Sahaal.

Eris is a dwarf planet of the Kuiper belt, beyond Pluto, in the outer Sol system.

Eskrador is a world of the Imperium, placed by chart in the Ultima Segmentum, and is remembered chiefly as the site of a major battle between the Ultramarines…

Espandor is a forested cardinal world on the eastern marches of Ultramar that formerly supplied the sub-sector with food from the Boreaus agri-sprawl.

The Essene is a rogue trader vessel appearing in Dan Abnett’s Eisenhorn novels, owned and commanded by Tobias Maxilla.

Estaban III is the inner forge of the Estaban System and the seat of Legio Tempestor, the Titan legion known as the Stormlords.

Estaban VII is the outer forge of the Estaban system, home to Legio Magna (the Flaming Skulls) and to a plant that still produces Baneblade tanks.

The Eternal Crusader is the flagship of the Black Templars Space Marine Chapter, a Gothic-class battle barge that serves as its mobile fortress-monastery.

The Eternity Wall spaceport was one of the principal spaceports of Terra, integrated into the planet’s outer fortifications during the Horus Heresy.

Etiamnun III is a barren and airless world on the Eastern Fringe of the Ultima Segmentum.

Etorras is a world that passed from the Imperium to the T’au Empire after its population came under T’au influence.

Eucopia was a forge moon to which no segmentum or coordinates are attested in surviving records.

Euphorus is a paradise world listed in the Ultima Segmentum whose name differs by one letter from that of Euphoros, a Great Crusade world.

Europa is a Galilean moon of Jupiter that the Imperium geo-engineered from an ice moon into an ocean world.

Eustis Majoris, also spelled Eustis Majorus, is the hive capital of the Angelus Subsector in Scarus.

Exhubris II is a swamp tomb world of xenos pyramids where Stygies VIII and Mars fought Ulthwé for a webway gate in 029.M41.

Eydolim is an Imperial shrine world of the Ultima Segmentum, the principal world of the Eydolim System, ruled by the Adeptus Ministorum.

Fal’shia is a T’au artisan sept in the First Sphere, where Earth Caste engineers turn prototypes into doctrine.

Fall’yth is a sept world of the Farsight Enclaves, the breakaway T’au domain on the Eastern Fringe.

Farness Beta is a world near the Cadian Gate where Inquisitor Quixos attempted to reproduce Cadia-style pylons in order to constrain the Eye of Terror.

The Farness Beta pylons are a complex of ancient xenos installations on Farness Beta, studied covertly by the renegade Inquisitor Quixos.

Faze V is a world for which no segmentum, no star system, and no coordinates are recorded.

Fenksworld is a hive world in the Josian Reach that hosts a Battlefleet Calixis depot.

Fenris is the death world of the Space Wolves Chapter, a planet of ice, volcanoes, and a world-ocean that submerges islands with each season.

Fi’rios is a fortress sept of the Third Sphere, taken from an Ork warlord at heavy cost.

Firestorm is the industrial homeworld of the Aurora Chapter, a Second Founding successor of the Ultramarines.

The First Moon of Varsavia is a numbered moon of the cold feral world Varsavia, in the home system of the Silver Skulls Chapter.

The Fist of Iron was a warship of the Iron Hands Legion, active during the Great Crusade and the Horus Heresy of the late thirty-first millennium.

Formal Prime is a Sabbat hive world that Warmaster Slaydo captured in person during Operation Redrake.

Fornax is an industrial world in the Segmentum Tempestus, distinct from the Sabbat Worlds hive Fornax Aleph and the forge world Fornax Orbis Majoris.

Fornax Aleph is a Sabbat hive world whose population disappeared before the Imperial Guard landed and where General Elbeth’s garrison was later lost.

Fortis Binary is a Sabbat Worlds forge complex that Chaos forces converted into some four hundred kilometres of trenches and ruined manufactories.

The Fortis Binary forges are the principal industrial and manufactory domains of the forge world Fortis Binary.

Fularis is the namesake world of the Fularis cluster in Bhein Morr, a civilised system that hosted the Blackstone I fortress before the Gothic War.

Fularis II is a Bhein Morr planet on which Abaddon demonstrated that captured Blackstone fortresses could fire in unison.

Fularis III is the third Bhein Morr marker in the Fularis cluster, positioned beside Fularis and Fularis II on the Gothic War map.

Galaspar is a hive world in the Galaspar System, settled during the Dark Age of Technology.

Galen VI is a harsh world in the Maelstrom Zone that became the Galen System’s last refuge after the Badab War.

Ganymede is the largest moon of Jupiter and the former centre of the Jovian yards, later rebuilt as the Hub-Fortress Aquila Adamant.

Gardinaal, also styled Gardinaal Prime, is the capital world of the Gardinaal dominion, a single-system human civilisation within the region known on Imperial…

Garm is a shrine world of the Space Wolves Chapter, named for Garm, a warrior of the Chapter who fell in battle against the Daemon Primarch Magnus the Red…

Gathalamor is a cardinal world south-west of Terra, a pilgrimage destination noted for its crypts, cathedrals and ossuaries.

Gaudinia Prime is the principal world of the Gaudinia System, one of eight worlds in the system.

Gazda is a world named in Dan Abnett’s Gaunt’s Ghosts novels, situated within the wider Sabbat Worlds theatre of the Sabbat Crusade.

Gehöft is a former Imperial agri-world, now a dead world.

Gereon is an agri-world in the Khan Group, within the Sabbat Worlds, occupied by Archenemy forces during the Sabbat Worlds Crusade.

Gershom was the world of Valentin Drusher, a Magos Biologis, where a Cognitae cell and an Enuncia surge drew Eisenhorn back into Ravenor’s long war.

Gerstahl is a shrine world whose coordinates are not recorded.

Gethsemane is a hive world in the Gothic Sector, the namesake of its subsector and the site of a major naval battle in 151.M41.

Geviox is a mining world of the Imperium in the Gevion Cluster Worlds sub-sector of the Uhulis Sector.

Ghaslakh is a reputed Ork capital on the Eastern Fringe, rimwards of Sotha, that Horus cited as the pretext for assembling forces at Calth.

Gheden is the Nihilakh crownworld, partly phased into a pocket dimension for most of each orbit after its dimensional stabilisers failed.

Ghenna was a Great Crusade-era world; no segmentum, system, or coordinates are recorded for it.

Ghosar Quintus is a mining planetoid in the Eastern Fringe of Ultima Segmentum, where the Imperium first encountered a Genestealer Cult in earnest.

Ghül is a world of the uncharted system coded 5213X by the Imperium, lying months outside settled Imperial space in the Segmentum Obscurus.

Gidrim is a Necron tomb world of the Sautekh Dynasty, the seat of Nemesor Zahndrekh and the centre of a small realm of roughly a dozen systems.

Gildar Octavius is the eighth numbered world of the Gildar System, an outer world of the Rift patrolled by the Silver Skulls.

Gildar Primus is the innermost numbered world of the Gildar System, which the Silver Skulls patrol.

Gildar Quartus is a Rift world patrolled by the Silver Skulls and the fourth numbered planet of the Gildar System.

Gildar Quintus is an agri-world in the Gildar Rift, a region patrolled by the Silver Skulls and characterised by wrecks and toxic fog.

Gildar Secundus is the principal settled world of the Gildar System, where Silver Skulls Captain Daerys Arrun died fighting Huron Blackheart’s Red Corsairs.

Gildar Septimus is the seventh numbered world of the Gildar System, an eight-world system that the Silver Skulls purged in a matter of weeks.

Gildar Sextus is the sixth numbered world of the Gildar System, an outer Rift location swept by the Silver Skulls after Huron’s Corsairs fled.

Gildar Tertius is the third numbered world of the Silver Skulls’ Gildar System, charted beside the Tertius Anomaly.

Glavia is a storm-world in the Helican Subsector, noted for its pure silicon, the Vortex Rapids and the Betancore pilots.

Gnosis Secundus is a world of the Gnosis System in the Talhor Sector, described as a moon near the hive world Gnosis Prime.

Golgotha is an Ork world of sulphur deserts and mountains, in the Golgotha System on the north-western rim of the Maelstrom, Ultima Segmentum.

Gorgon Quintus is a death world in the Deluvian Sub-sector of the Orpheus Sector, used as an Imperial Guard muster point and later as a castrum.

Gorgonum is an Imperial forge world plotted north of the Maelstrom and filed under Ultima, distinct from the death world Gorgon Quintus.

Gorkamorka is the former survey world Angelis, scarred by an Ork hulk impact that formed a canyon called Da Skid.

Gorro was an Ork world of the Telon Reach, serving as capital of a province within the Ork empire of Ullanor during the era of the Great Crusade.

Graia, known as the Crown of Miracles, is a Mechanicus world and the richest forge in the Belt of Iron.

Graia is a forge world of the Adeptus Mechanicus, known as the Crown of Miracles for the density of its manufactorums and the Titans raised in its yards.

Graia II is a zero-confidence catalogue entry listed under Ultima, distinct from the forge world of Graia recorded as graia-1752.

Graiad is a world in the Endorian Sub-sector of Segmentum Obscurus, whose population Imotekh the Stormlord scoured from orbit.

Gravalax is an agricultural world of the Ultima Segmentum, situated in its own star system and not a sept world of the T’au Empire.

Grief I is a death world in the Grief System, an otherwise empty system of the Maelstrom Zone.

The Grim Scythe, also spelled Grym Scythe, is a space hulk infested by servants of Nurgle.

Gryphonne III is a world in the Talos System and a neighbour of the forge world Gryphonne IV, from which it is distinct.

Gryphonne IV was a Tempestus forge world of the Adeptus Mechanicus, seat of the eight-system Octad, until Hive Fleet Leviathan overran it in 998.M41.

Gudrun is a feudal world of noble houses in the Thracian Primaris system and the former Helican capital.

Gudruntraille is a zero-confidence catalogue entry in the Ultima Segmentum, formed by a name merger, and is distinct from the world of Gudrun.

Gyros-Thravian was an Ork world of the Ullanor era and the stronghold of Gharkul Blackfang.

Haddrake Tor is the site of a three-year Imperial Fists siege against Chaos heretics.

Haeleon is a planet whose surface is described as shimmering and mirror-like; no sector, system, or coordinates are recorded for it.

Hagia is a feudal shrine world in the Sabbat cluster, birthplace of Saint Sabbat and the site where her remains were kept.

Hanorio V is a world under the control of the Iron Warriors.

Harakon is a low-gravity hive world whose spires rise high enough to breach the upper atmosphere.

Haranshemash, formerly known as Haran and afterwards renamed ‘world of blood and tears’, is an Exodite world.

Harmony is a daemon world in the Eye of Terror held by the Emperor’s Children, formerly the site of the Canticle City.

Hazzephet is an Imperial world near the former Cadian Gate for which no sector, system, or coordinates are recorded.

Hellabore is an Imperial world for which no segmentum, sector, system, or coordinates are recorded.

Herod is a mining world in the Achilles Sub-sector, supplying mesa crystals for lasgun production, and a battleground of the 13th Black Crusade.

Herodor is a shrine world of the Sabbat Worlds, holding little strategic worth of its own but standing at the centre of two events that shaped the wider.

Hesiod’s Wake is an agri world in Hazeroth that has paid a grain tithe to hive Clove for centuries.

Hevaran is an Imperial world.

Hive-Moon Sigma is a hive-moon orbiting Ceti Albus.

Hollonan is an Imperial hive world lying near Corinal, home world of the Angels Vermillion Chapter.

Honoria is an Imperial world, also known in Crusade-era records as 27-21.

Honourum is a lightning-wracked feral world in the galactic north and the seat of the Novamarines Chapter at Fortress Novum.

The House Glaw estate was the ancestral manor of House Glaw, a noble merchant dynasty of Gudrun, within the Gudrun system.

Hubris is a Helican ice world whose long elliptical orbit leaves it frozen for eleven of every twenty-nine months.

The Hubris Cryotombs form a cryogenic tomb complex within the Hubris system, associated with the massacre attributed to Inquisitor Tuomas Eyclone.

Hubris II is a location in the Hubris System, catalogued here under a Helican parent, with minimal supporting documentation.

Hubris IV is a planet assigned to Segmentum Obscurus, although the reliability of that placement is low.

Hyades is a promethium-producing jungle world in the Segmentum Obscurus, under the protection of the Space Wolves.

Hydra Cordatus is a forge world near the Eye of Terror that housed a vault of Imperial Fists gene-seed, the hereditary material of Space Marines.

Hydra Minoris is the first planet of the Hydra Cordatus System, in the Sentinel Worlds, in Segmentum Obscurus.

Hydraphur is the fleet capital of Segmentum Pacificus, with orbital shipyards, a star fort and a surface shared by the Navy, Ecclesiarchy and Mechanicus.

Hypnoth is a former Imperial forge world in the Ironhame Sub-sector of the Vidar Sector, Ultima Segmentum.

Iax is an agri-world of Ultramar whose fertility once rivalled Macragge and Konor, until Mortarion’s Plague Wars reduced it to a death world.

Icaria was a world with no recorded segmentum, system, or coordinates, destroyed in the Era Indomitus.

Ichar IV is a hive and industrial world north of Ultramar that exported ore and myco-protein before a Genestealer cult seized it.

Idharae is a ruined Aeldari craftworld, a world-ship reduced to a hulk by the Invaders Space Marine Chapter.

Iduno is an Imperial world for which no segmentum, sector, system, or coordinates are recorded.

Ignix is the smallest Grand Banks fief of the Helican Subsector, a wet-mining world subject to seasonal electrocorporeal storms.

Il-Kaithe, a name meaning “Knowledge of Blood”, is a Ghost Stars craftworld that wages war against Chaos from the edge of the Eye of Terror.

Imhathok is an Imperial world in the Ultima Segmentum.

Incaladion is an Ultima forge established during the Age of Strife and formerly the home of Legio Fureans, the Tiger Eyes.

Indiga is a mining world in the Ultima Segmentum that became a man-made death world after animals escaped from a governor’s private zoo.

The Invincible Reason served as flagship of the Dark Angels Legion during the Horus Heresy, the command vessel of Primarch Lion El’Jonson.

Inwit is an ice world of hive-caverns and nomad clans, where Rogal Dorn rose to rule the Inwit Cluster.

Io is a volcanic Galilean moon of Jupiter, described in Horus Heresy sources as an orange world bearing Mechanicum habitats on its crust.

Iocanthos is a war-world in the Calixis Sector whose principal export is Ghostfire pollen, used in penal combat drugs.

Ioline is an industrial world in the Diamor System, Segmentum Obscurus; no coordinates are recorded for it.

Iron Blood is the flagship of the Iron Warriors Legion, serving as the principal command vessel of Perturabo during the Horus Heresy.

Ironfound is an Imperial forge world whose manufactories supply munitions essential to the war effort of its subsector.

Isstvan Extremis is the outer augury-nexus of the Isstvan system, silenced at the opening of the Isstvan III Atrocity.

Isstvan III is the world where Horus openly revealed his rebellion, through an attack by four Legions on their own loyalists.

Isstvan V is the site of the Dropsite Massacre, in which three loyalist Legions were attacked from behind by four Legions that had been presumed loyal.

Ithaka is the ocean homeworld of the Iron Snakes Chapter in Segmentum Obscurus, also known as the Cradle of Snakes.

Iyanden is an Aeldari craftworld of the Eastern Fringe, once among the most populous of its kind before Hive Fleet Kraken devastated it in 992.M41.

Iybraesil is a matriarchal craftworld whose Howling Banshee and Morai-Heg cults search Crone World vaults for spirit stones and doomsday engines.

Iydris, also called Amon ny-shak Kaelis, was an artificial Eldar crone world suspended above a supermassive black hole in the Eye.

Jagga was an Ork world of the Star Krumpas freebooterz, or pirates, consumed by Hive Fleet Behemoth.

Jago is a fortress world of the Cabal Systems, whose trenches and gun-boxes appear older than humanity.

The Jago fortress line was a network of fortifications on the world of Jago, the site of a costly siege fought by the Tanith First-and-Only.

Jahga is an ice moon in the Archaea System, assigned to the Star Phantoms Chapter after the Badab War.

Jendara Quintus is a civilised world in the Tremayne Sector that the Grey Knights destroyed during the Months of Shame.

Jerulas is a hive world in the Jerulas system, brought into the Imperium by the Black Templars under High Marshal Ludoldus during the Jerulas Crusade.

Jerulas Station, formerly Dironth, is a Mechanicum forge in the Belt of Iron, renamed after Rogue Trader Militant Pierant Jerulas.

Jopal is an Imperial world of the Jopal System in Segmentum Solar, lying not far from the Armageddon System.

Jopall is an agricultural world in the Armageddon subsector whose citizens are born in debt and may enlist in the Indentured Squadrons to discharge it.

Josiah Quintus is an Imperial world of the Karthago Sector in the Ultima Segmentum, for which only a limited published record exists.

Jouran is a civilised capital world whose noble houses send their first-born into the Planetary Defence Force and value Imperial Guard commissions.

Jovandira is an Imperial Relic World in the Ultima Segmentum.

Jupiter is a gas giant in the Sol system whose orbital docks have built Navy vessels, from interceptors to Emperor-class battleships, since the Crusade.

K’resh is a world of the T’au region recorded as the site of the K’resh Expansions, an Ork war fought during the Great War of Confederation.

Kadaku is a jungle death world in the Recidious System, Segmentum Tempestus, and the opening location of the video game Warhammer 40,000: Space Marine 2.

Kaelor is a world-ship that departed for the galactic rim long ago and returns to the Calixis Sector only about once every thousand years.

The Kalium Gate is a Dark Age warp-gate necklace, a chain of stations in the Kalium System, classified on 40k Orrery as a webway location.

Kallius’ Landing was a world in the Kallius Subsector, its exact coordinates unrecorded.

Kamiti Sona was an Imperial prison-station for psykers during the Great Crusade and the Horus Heresy.

Kanak is a volcanic feral world whose tattooed tribes supply the Imperial Guard’s Skull Takers, regiments that favour close combat.

Kar Duniash is the segmentum fortress and naval academy of Ultima Segmentum, and the shipyard that builds Dominator cruisers.

Karkason is a volcanic mining world producing transuranic elements and power crystals, featured in Ian Watson’s novel Space Marine.

Kasr Holn is the fifth world of the Cadian System, a sister fortress to Cadia rather than a fortress-city (kasr) on Cadia’s surface.

Kasr Partox was the eighth Cadian kasr, overrun during the thirteenth Black Crusade and later absorbed into a daemon world.

Kasr Sonnen is the third Cadian fortress world and, with Macharia, one of the last Imperial holdouts in the Cadian system after the Fall of Cadia.

Kastorel-Quintus is the fifth planet of the fourteen-planet Kastorel System in Segmentum Tempestus, listed on the Imperial Armour Eight chart.

Kaurava I is the urban capital of a system in the Lithesh Sector and the Imperial Guard’s seat in the Soulstorm war.

Kaurava II is a tropical world on which the system’s Planetary Defence Force never cleared feral Orks.

Kaurava III is a barren world where dormant Necrons awoke beneath the crust and where Eldar forces intervened in an attempt to return them to dormancy.

Kaurava IV is a rural world in the outer part of its system, where a warp storm and a Chaos warband arrived together.

Kavell is a world named among the places at which the Alpha Legion Daemon Prince Kernax Voldorius eluded the White Scars during the Hunt for Voldorius.

KCX-1288 was a collapsing Saruthi system in which Eisenhorn burned the Necroteuch and House Glaw’s exchange ended in the void.

Ke’lshan is a fortified sept of the T’au Second Sphere, situated beside the Perdus Rift and subjected to repeated raids.

Keffia is an agri-world of the Ultima Segmentum, a rural Imperial holding whose settlements and farmlands once sheltered a major genestealer cult.

Keylek was a xenos world, the homeworld of the keylekid, a reptilian species first encountered by the Luna Wolves during the Great Crusade.

Khan IV is a world in the Khan Group, a cluster within the Sabbat Worlds of the Warhammer 40,000 setting.

Khanuris is a world of the Sabbat Worlds, a theatre of war featured in Dan Abnett’s Gaunt’s Ghosts series.

Kharaatan is an Imperial world designated One-Five-Four-Six by the Administratum.

Kheru is a location described inconsistently within the same account, as both the outer gas giant of the Baal system and an arid sentinel world.

Khirab V is the only charted world of the Khirab System, in the Endymion Cluster of Ultima Segmentum.

Khollorn VII is a former Imperial hive that Vior’la conquered and converted into a T’au sept.

The Khthonic Gate is a Dark Age warp-door on Pluto, twin of the Elysian Gate, that admits traffic into Sol without a conventional translation.

Khur was a world of the Ultima Segmentum, the site of Monarchia, the Perfect City raised by the Word Bearers Legion in the Emperor’s honour.

Kiavahr is a polluted forge world of hive-factories that supplies munitions on a scale approaching that of a full Mechanicus world.

Kimdaria is a Tempestus knight world, colonised by House Mortan, that lay beneath a dense gloom known as the Black Pall.

Kimmeria is a feral world and a Dark Angels recruiting world in Ultima Segmentum.

Klaisus, also spelt Kalisus and known to the Aeldari as Ulthanash’s Rest, is an ice moon, the body furthest from the sun in the Cadian System.

Klybo is a dead world in the Calixis Sector where a failed colonial settlement left ruins that later attracted prospectors and tech-archaeologists.

Kolossi is a planet in the Ultima Segmentum, also known by the alternative name Korvosi.

Kolovan was an Imperial industrial world, now a dead world.

Konor is the forge and shipyard world of Ultramar, one of its four tetrarchies, named for the Macragge nobleman who adopted Roboute Guilliman.

Kophyr is a planet of the Imperium on which Saint Celestine led Astra Militarum forces against War Engine.

Kornovin is a world with no recorded segmentum or coordinates.

Korolis is the second planet of the Cadian System, in the Cadian Sector of Segmentum Obscurus, and no galactic coordinates are recorded for it.

Korsh is a world for which no segmentum, no star system, and no coordinates are recorded.

Krade is an Imperial world in Ultima that the Iron Warriors fortified as a delaying position against Guilliman’s advance during the Horus Heresy.

Krieg is a former hive world whose sole enduring export is the Death Korps, its surface scoured barren by atomic war and centuries of trench fighting.

Krongar is an Ork world in the Krognar System, in the Skarskell Subsector of Segmentum Ultima.

Kronus is a world in the Lithesh Sector and the setting of Dawn of War’s Dark Crusade, in which seven armies contest its territory.

Ksi’m’yen was the first sept world of the Tau Third Sphere, an Imperial planet taken by stealth while its garrison was absent.

Kulth is the capital of the Periphery and a world contested for eighty years by the Imperium, Orks led by Ghenghiz Grimtoof, and the Severan Dominate.

Kvariam Alpha is an Imperial ocean world in Ultima Segmentum, where the T’au concealed seabed mining settlements until Space Wolves destroyed them.

Kylasma is a gas giant orbited by the moon Aionos.

Kyren was a daemon world of Tzeentch in the Maelstrom, made entirely of crystal and formerly a feral world.

Laeran, also designated Twenty-Eight Three, was an ocean world in Ultima Segmentum and the homeworld of the Laer, a non-humanoid alien species.

Landunder is a Malfian hive whose crust floats on a chemical ocean, with eight cities suspended beneath it.

Laomedeia is a moon of Neptune in the Sol System.

Laphis is a shrine world of Ultramar, held within the Macragge System as a place of pilgrimage and devotion.

Lentonia was a planet to which no segmentum or coordinates are attested in surviving records.

Lesser Damantyne is the Ultima fortress-world of the Schadenhold, the keep of Warsmith Barabas Dantioch’s loyalist Iron Warriors.

Lethe is an industrial world of the Gothic Sector, situated in the Coronid neighbourhood of Port Maw.

Lethe XI, also called Lethe Eleven, was a Scarus hive associated with Eisenhorn and noted for metalwork, shield technology and a two-week eclipse.

Lileathanir is an Eldar Exodite world in Segmentum Tempestus, the site of the World Shrine from which the Kabal of the White Flames stole Worldsinger Laryin.

Limaxis is a world on which Typhus brought the Terminus Est during the War of the Spider, a conflict recorded at the Cadian Gate in M42.

Lion’s Gate spaceport was a principal orbital spaceport of Terra, sited by the Lion’s Gate of the Imperial Palace’s Ultimate Wall.

Lochos is a world of Ultramar, the star-dominion built by the Ultramarines Legion in the Ultima Segmentum during the Great Crusade.

Loki was an industrial world of Segmentum Pacificus.

Long Halent is a Sabbat Worlds planet liberated in 755.M41 by the force of Lord Militant Dravere, one of four opening targets of Operation Redrake.

Lorn V is a frozen former Exodite world on which the Imperator Titan Dominatus crashed atop the Arcadian Gate.

Lub’grahl is a memorial world of the Farsight Enclaves, a planet of earthen spires laced with tunnels, where the Earth caste are the most numerous inhabitants.

Lucid Prime is an Imperial shrine world.

Lucius, known as the Hollow Forge, is a world with an artificial sun at its core, in the Cyclops Cluster of the Gothic Sector, Segmentum Obscurus.

Lugganath, called the Light of the Fallen Sun, is a craftworld that seeks to leave the galaxy and establish a civilisation of its own within the Webway.

Lumerius was a frozen world of ice and snow, lit by a distant blue star, lying near the Eye of Terror.

Luna is Terra’s only moon, a fortified satellite whose gun batteries and shipyards form part of the defence of the Throneworld.

Lurid IX is an Imperial civilised world in Ultima Segmentum.

Lylogir is an outcast Aeldari Exodite world conquered by the Imperium during the later stages of the Ribos Crusade.

Lyriax is an Imperial-catalogued world in the Segmentum Tempestus that the Aeldari monitor; it is neither a Craftworld nor an Exodite world.

Lysios was an inhabited world of the Cryptus system where fighting occurred during the Cryptus Campaign of 998.M41.

Lyubov is a Sabbat hive described as a transcontinental nexus, occupied for decades until Carnhide’s arrival in 778.M41.

Maccabeus Quintus is a shrine in the Drusus Marches, the site where Lord Militant Drusus was cut down during the Angevin Crusade and later returned.

Macharia is the sixth world of the Cadian System, a militarised hive world and Gate holdout, and is not the shrine of Lord Solar Macharius.

Macharia, formerly Donia, is a shrine world in the Donia Magna System and the home world of Lord Solar Macharius.

Mackan is the world where, in 811.M37, Abaddon’s Black Legion nearly destroyed the Blood Angels.

Macragge is a mountain world in the Ultramar sector, the capital of the Five Hundred Worlds and homeworld of the Ultramarines Chapter.

Macragge’s Honour is a Battle Barge of the Ultramarines Chapter, one of the largest warships in the Adeptus Astartes fleet and flagship of Roboute Guilliman.

Madrighoul is a planet on which Calas Typhon, later known as Typhus, saved a squad of the Sisters of Silence during the Great Crusade.

Maeleum was a daemon world held by the Sons of Horus after the Horus Heresy and the site of the Monument raised around the corpse of Horus.

Magdelon is an Imperial world whose principal settlement, the Crystal City, is built from vast formations of natural crystal rising from the planet’s bedrock.

Maginor is the Niaides capital, linked to the Mystic Path’s warp-artefact trade and to Inquisitor Quixos’s mountain stronghold.

Magnifira, also spelled Magnifiria in the same campaign account, is a world in the Duralim System, in the Charadon Sector.

Mai Nine is a gas giant with at least three moons.

Malakbael was a shrine world in the Malak System, within Imperium Nihilus; no segmentum or coordinates are recorded for it.

Malan’tai was an Aeldari craftworld destroyed in 812.M41 when a vampiric Zoanthrope drained its Infinity Circuit, leaving a drifting hulk.

Malefus Murex is an asteroid in the Pandorax System, and no coordinates are recorded for it.

Malfi is the hive capital of rimward Calixis, a world of twenty-three billion inhabitants noted for political intrigue.

Malinter is a waste-world of the Angelus Subsector in the Scarus Sector, its surface given over to ruin and desolation with little to recommend it beyond…

Malodrax was an Iron Warriors fortress world.

Malvolion was an agri-world in the Ghost Stars, consumed by the Tyranids in 992.M41 and depicted in a short story by Dan Abnett.

Mandragora is the crownworld of the Sautekh dynasty, a Necron polity whose stasis-crypts lie on the Eastern Fringe of the galaxy.

Marax, also charted as Lacaon VI, is a Chaos-held death world in the Balthar System where Imperial rule gave way to heresy and daemons.

Mars is the principal forge world of the Adeptus Mechanicus, seat of the Fabricator-General and the industrial heart of the Cult Mechanicus’ Machine God faith.

Masali is one of the Three Planets of Ultramar, an arid desert world converted to agricultural use to supply the Five Hundred Worlds.

Maze Undue was a Cognitae academy for blanks, or pariahs, within Queen Mab until the Inquisition destroyed it in the mid-41st millennium.

Medrengard is a daemon world in the Eye of Terror, the fortress-planet of the primarch Perturabo and the principal base of the Iron Warriors Traitor Legion.

Medusa is the waste world of the Iron Hands, a quake-torn planet of ash and poisoned skies inhabited by clan haulers.

Medusa V is a mining-industrial hive world in the Ultima Medusa System, named in courtesy to the Iron Hands but never their homeworld.

Medusa VI is a world named on the system map of the Fall of Medusa V campaign, for which little further information is recorded.

Medusa VII is a Sautekh tomb world in the Ultima system, which also contains Medusa V, a quarantined dead planet.

Melchior is a world of the Imperium brought to Compliance during the Great Crusade.

Menazoid Epsilon is a small death world of the Menazoid Clasp, a Chaos shrine-target, and the place where Dravere died during its capture.

Menazoid Sigma is the capital world of the Menazoid Clasp, a group of worlds in the Sabbat Worlds, as named in the novel First and Only.

Mercury is a mining world on the inner edge of the Sol System, close to the star Sol.

Meridian is a hive world in Subsector Aurelia, featured in Dawn of War II, that became the subsector’s industrial capital after Aurelia froze in the warp.

Merov is a hive world in the Golgenna Reach of the Calixis Sector, best known as the home of the Merovech Combine.

Messina is a temperate Helican world in the Thracian Primaris System that housed Eisenhorn’s Distaff until Pontius Glaw’s Vessorine hirelings burned it.

Forge World Metalica is an Adeptus Mechanicus forge world in the Charadon sector whose economy and identity rest on the extraction and working of metal.

Mezoa is a volcanic forge in the Gothic Sector, established from Lucius stock with the assistance of Ferrus Manus and the Emperor.

Mezoa XV is an unverified location entry in Segmentum Pacificus, distinct from the forge world Mezoa in the Gothic Sector.

Michar’s Meadow is an Imperial agri-world to which Grey Knights Brother-Captain Stern led a strike force after a Prognosticar vision of M’kachen.

Midgardia is a world recorded within Space Wolves–associated lore, its Norse-derived name echoing the mythic idiom of the Fenris system.

Minos is an ancient star fort sited at a Webway junction in the Ormeus System, within the Tempestus region of the Caligari Sector.

Miquol is a polar island on the agri-world of Durer where Fayde Thuring awakened the Chaos Warlord Titan Cruor Vult.

Miral is a jungle death world in the Ultima Segmentum where the Scythes of the Emperor Chapter made a final stand against Hive Fleet Kraken.

Miral II is a location in the Miral System where the Imperial Fists held a fortified position against Leviathan for seven days in 997.M41.

Miral Prime is the nameplate world of the Tempestus Miral System, distinct from the Ultima Scythes battlefield that is also sometimes called Miral.

Mistral is an Imperial world on which Baron Bartholomew Lom led an uprising in late M41.

Modanna is a hive world that served as the foremost stronghold of the Alpha Legion Daemon Prince Kernax Voldorius in the forty-first millennium.

Moebius is the capital tomb of the Nekthyst dynasty, a hyperspace maze of crypts whose layout rearranges so that no two journeys through it are the same.

Molech is a Knight world in the Segmentum Solar, ruled from Lupercalia by House Devine until its allegiance broke during the Horus Heresy.

Monarchia was the capital city of Khur, raised by its people as a monument to the Emperor and the teachings of the Word Bearers Legion.

Mons Magnifica is an Imperial forge world of the Adeptus Mechanicus.

Monthax is a jungle in the Newfound Trailing of the Sabbat Worlds, where Imperial forces fought Chaos while Eldar sought to seal a webway gate.

Mordian is a tidally locked hive world whose population is concentrated on the hemisphere of permanent night; the other face is baked.

Morlond is a Sabbat fortress world held by Chaos forces until Warmaster Macaroth led the assault on it in person.

Morlond citadel is a fortified citadel complex on the world of Morlond, a theatre of ground war referenced within Dan Abnett’s Gaunt’s Ghosts series.

Mortrex is a world in the Ultima Segmentum that gave its name to the Parasite of Mortrex, a Tyranid bioform associated with Hive Fleet Kraken.

Mozung is a world attested in Dan Abnett’s Gaunt’s Ghosts novels, associated with the Sabbat Worlds Crusade setting of the Warhammer 40,000 fiction.

Murder was an Ultima Segmentum world, named by Imperial forces for the megarachnid xenos that infested it, and subdued during the Great Crusade.

Mymeara is an isolationist Aeldari craftworld that withdrew from galactic affairs for centuries after Ork incursions nearly annihilated it.

Mysibis is a world of the Imperium.

N’dras was a T’au sept in the Second Sphere that the Ethereals later emptied of its population, for reasons they never stated.

Narsis is a fortress world brought into Imperial compliance by the Emperor’s Children, who raised there the Perfect Fortress, a stronghold guarding nearby…

Necromunda is a hive world in the Segmentum Solar, ruled by House Helmawr from Hive Primus and devoted to the manufacture of weapons.

Nemendghast is an industrial world in the Vigilus System, where Black Legion daemon-forges operated during the War of Beasts.

Nemesis Tessera is a wasteland planet containing a buried Inquisition dungeon-fortress, located close to the Eye.

Nemeton is a planet of Segmentum Obscurus, held as the home world of the Emperor’s Spears, within the region known as Elara’s Veil.

Neptune is an outer world of the Sol system, colonised in the Age of Terra and later devastated, where Triton still mines corvinium.

New Badab is the Maelstrom fortress of Huron Blackheart, used as his base after the death of Badab Primaris.

New Cadia is the name attached to proposals for a successor homeworld for the Cadian diaspora after the destruction of Cadia in 999.M41.

New Catachan is an Imperial world in the galactic core, situated among Leagues of Votann holdings, and is distinct from the death world of Catachan.

Nicaea is a planet of the Segmentum Solar, known to history chiefly as the venue of a single, momentous gathering during the opening phase of the Horus Heresy.

Nikaea is a terraformed world where the Emperor convened the Council of Nikaea, an assembly of the Legions on the use of psykers, late in the Great Crusade.

Nimbosa is an Imperial industrial world on the T’au border.

Nocturne is a volcanic death world of the Imperium of Man and the homeworld of the Salamanders Space Marines, the XVIII Legion and its successor Chapter.

Nosfer is an Imperial world remembered for the Nosfer Planetstrike against Necron forces under Lord Zangeneb.

Nostramo was a sunless, crime-ridden world in the Nostramo system, homeworld of the primarch Konrad Curze and his Night Lords Legion.

Nova Thulium is a world of the Macragge system, and the birth world of Marneus Calgar.

Nuceria was the gladiator world that shaped Angron, later primarch of the World Eaters, and whose ruin in the Horus Heresy fixed his fate as a daemon prince.

Nurth is a desert world of the Ultima Segmentum, a former Terran colony that had fallen to pre-industrial technology by the time of the Great Crusade.

Nusquam Fundumentibus is an ice world of cavern-hives, with its capital at Primadelving, situated far from the main warp lanes.

Obsidia is a fortress-world that belonged to the Astral Knights until their destruction and was afterwards granted to the Sable Swords.

Occludus is an Imperial world in the 40K setting, recorded as the fortress of the Death Spectres Space Marine Chapter.

Octarius, known also as Octaria or Octavius, is a mountainous mega-continent world that served as the capital of the Ork empire ruled by the Overfiend.

Octarius Sigma is a zero-confidence location entry placed within the Ghost Stars and is distinct from the Octarius Sector.

Ogrys is the home world of the Invaders Space Marine Chapter, in the Ogrys System of Ultima Segmentum.

Oldarian is a world of the Imperium whose segmentum, sector and system are not recorded.

Olympia was Perturabo’s mountainous home world, a planet of city-states and fortresses that the Imperium now lists as perdita.

Omis-Prion is a tomb world in the Vigilus system, on the Nachmund Gauntlet, and is distinct from the planet Vigilus itself.

Omnia is a world named among the Sabbat Worlds, a war-torn cluster subject to a protracted Imperial Crusade.

Omnicide is a hell world for which no segmentum, sector, system or coordinates are recorded.

Onscard is a planet of the Sabbat Worlds that fell to Lord Militant Dravere in 755.M41 as one of four opening strikes of Operation Redrake.

Ophelia IV is a world in the Corribra Sector of Segmentum Tempestus, according to the Jambonium map.

Ophelia VII is a cardinal world of the Imperium of Man, ranked second only to Terra in ecclesiastical seniority and seat of the Convent Sanctorum.

Ophelia VIII is a numbered world of the Ophelia System, distinct from Ophelia VII, the cardinal see of Celestine and seat of the Convent Sanctorum.

Optera IV is a feral world of the Imperium in the Optera System, part of the Pale Stars region of the Maelstrom Zone in Ultima Segmentum.

Orana was a hive world that, at an unspecified point in the 41st millennium, suffered a Chaos invasion transforming its capital hive into the Hellspire.

Orar is a hive world in the Gothic Sector, the namesake of its subsector, and the site of an early Chaos reversal in the 12th Black Crusade.

Ouranberg is an industrial hive world within the Sabbat Worlds, prominent as the principal setting of Dan Abnett’s Gaunt’s Ghosts novel Blood Pact.

The Palace of Slaanesh is the Warp seat of Slaanesh, recorded on this map as a webway location under the Ghost Stars rather than as a planet.

Palacia is an Imperial world for which no segmentum, sector, system or coordinates are recorded.

Paramar V is a Mechanicum fuel-and-munitions world on the Isstvan–Terra supply route, sited within a trinary star system of bunkers and promethium refineries.

Paramar V is a radiation-scoured Mechanicum depot in northern Segmentum Solar, situated on a stable warp line between Isstvan and Terra.

Paramar XXI is a gas giant in the Paramar System, one of whose moons was rebuilt as the Pharaeon of Paramar, an Imperialis Armada anchorage.

Parenxes is a world of the Imperium.

In Warhammer 40,000, Parmenio is a world whose principal function is the training of Ultramarines; its capital is Hecaton.

Pavonis is an Imperial mining world of the Ultima Segmentum, best known as the setting of the Nightbringer campaign fought against a C’tan shard.

Pech is the Kroot nest world, a jagga-forest planet whose hives were abandoned after the kindreds allied with the T’au.

Pelegeron IV, also called Pelegeron, is a former Imperial mining world in the Pelegeron System, within a region known as the Pelegeron Cluster.

Percepton was a world of the Ultramar sector drawn into the Word Bearers’ war against the Ultramarines during the Horus Heresy.

The Battle of Perditus was fought about 009.M31 on a planet the battle article calls Perditus.

Perfidium is a shrine world maintained for the veneration of the Imperial dead, its surface dominated by mausolea, processional avenues and the great reliquary…

Peridos is an agri-world in the Diamor System, Segmentum Obscurus; no coordinates are recorded for it.

Periremunda is a plateau world of eighteen thousand habitable mesas above volcanic lowlands.

Perlia is a civilised world neighbouring Damocles that carries out the industrial work of its subsector.

Petropolis was the principal hive of Eustis Majoris, where Ravenor pursued flects and Slyte eventually forced Carl Thonius into the open.

Petropolis Undersink refers to the lower wards of the hive city of Petropolis on Eustis Majoris, as depicted in Dan Abnett’s Eisenhorn novels.

The Phalanx is the moon-sized fortress-monastery of the Imperial Fists, a starship that predates the Imperium and serves as the VII Legion’s seat.

Phall is a minor world of the Phall system in the Ultima Segmentum, known chiefly as the site of a space battle fought in the opening days of the Horus Heresy.

Phall I is a lightly populated agri-world and the namesake of the Battle of Phall, fought between Imperial Fists and Iron Warriors in 007.M31.

Phall II is a lightly settled, loyal agricultural world in the Phall system, known for the orbital warfare above it rather than for any ground campaign.

Phantine is a Sabbat Worlds planet of hive-spires above a toxic cloud layer, the setting of an airborne war in the Gaunt’s Ghosts series.

Phobos is the inner moon of Mars and serves as an orbital fortress whose gun batteries cover the planet.

Photep was a starship of the Thousand Sons Legion, attested in chronicles of the Horus Heresy and associated with the Legion’s fleet centred on Prospero.

Phyrr is a Calixis death world whose environment is lethal to any life that is not native to it.

Piscina is a neighbourhood marker in the Segmentum Obscurus, associated with a Dark Angels mining site researched separately as the Piscina System.

Piscina II is a world of the Piscina System in Segmentum Obscurus, sharing that system with the more widely recorded Piscina IV.

Piscina IV is a Dark Angels mining world about 6,000 light years east of the Eye of Terror, where continual skirmishes with Orks occur around old mine heads.

Piscina V is a volcanic death world, shrouded in cloud, from which the Dark Angels recruit aspirants once in each generation.

The Plague Planet is Mortarion’s daemon home in the Eye, also called Munificence by the Death Guard.

Pluto is a dwarf planet in the Kuiper Belt that overlooks the outer approaches to Terra.

The Pluto batteries were a network of orbital defence platforms stationed at Pluto during the Solar War.

Port Demesnus is an Imperial war world in Segmentum Obscurus.

Port Maw is the naval capital of the Gothic Sector, a hollow artificial planetoid named for its 500-kilometre aperture.

Port Wander is a Rogue Trader gateway station on the approaches to the Koronus Expanse, a principal Imperial anchorage before the Koronus Passage.

Posul, also spelled Prosul, was a feral night world inhabited by cannibal tribes and used as a recruiting ground by the Mortifactors Chapter.

Praetonis V is an Imperial forge world of the Zeist Sector in the Ultima Segmentum.

Praetoria is a hive world of the Segmentum Tempestus, situated near the naval yards at Bakka, that supplies recruits to the Praetorian Guard.

Prandium was an agricultural world in Ultramar, stripped of its biomass by Hive Fleet Behemoth in 745.M41 after a failed Ultramarines defence.

Prefectia was an Imperial fortress and the gateway to the Dovar System, captured by Shadowsun in the Third Sphere and renamed Vas’talos by the Water Caste.

The Pride of the Emperor was a battleship of the Gloriana class that served as flagship of the III Legion, the Emperor’s Children.

Prometheus is the unusually large moon of Nocturne that serves as the Salamanders’ fortress-monastery, ship-dock and Pantheon.

Prospero is the world of Magnus and the Thousand Sons, burned by Leman Russ’s Censure Host at the Emperor’s command and later rebuilt as a war-anvil.

Pyran is a civilised world in the Armageddon subsector, governed as a caste pyramid of plebeians, nobles and an Administratum-appointed governor.

Pythos is a jungle death world in the Pandorax System, in the Demeter Sector of Ultima Segmentum, and no galactic coordinates are recorded for it.

Quaddis is a pleasure world in Golgenna, divided into noble fiefs and classed neither as a hive world nor as a shrine world.

Quadravidia was a planet to which no segmentum or parent sector is attested in surviving records.

Quan Zhou is a fortress world of Segmentum Pacificus, counted among the tributary worlds bound to Chogoris, home world of the White Scars Space Marine Chapter.

Queen Mab was the southern hive of Sancour, the street grid of the Maze Undue and the mirror door into the City of Dust.

Quintarn is one of the Three Planets of Ultramar, together with Tarentus and Masali.

Quintus is a barren industrial world in the Quintus System, Magulanox Sector, where White Scars and Raven Guard killed the Daemon Prince Kernax Voldorius.

Rahe’s Paradise was a world of the Imperium, once a Necron tomb world and later an Aeldari Exodite world.

Raisa is a forest world in the Segmentum Tempestus, governed by House Cadmus from Golem Keep.

The Red Tear was the flagship battle-barge of the Blood Angels Legion, serving as Primarch Sanguinius’s personal command vessel during the Horus Heresy.

Reillis is a world charted within Segmentum Pacificus, though its precise position is no longer established and little further is recorded of its nature,…

Relorria was a cardinal world without attested coordinates, the site of fighting during the Eleventh Black Crusade in 301.M39.

Restitution is the homeworld of the Gilded Sons Space Marine Chapter.

Reth is a Tephaine location of warm shallows and island chains, now the site of the Asylum of Saint Vero.

Rhamiel is a place for which no segmentum, no star system, no world-class, and no coordinates are recorded.

Rothric IX is a planet on which the Tribeswar of Rothric IX was fought during the Great Crusade.

Rynn’s End is a plague-scoured Tempestus world of the Crimson Sabres in the Brakatoa System, distinct from Rynn’s World, the Crimson Fists’ home.

Rynn’s World is a mountainous agri-world in the Loki Sector of Segmentum Tempestus, and the home world of the Crimson Fists Space Marine Chapter.

Ryza is a forge world of the Adeptus Mechanicus, renowned across the Imperium as the plasma forge.

Sa’cea is a desert sept world of the T’au First Sphere, now roofed in dome cities and home to a population numbering in the trillions.

Sabbyst was an Imperial world invaded by the forces of the daemon primarch Fulgrim after the opening of the Great Rift.

Sabien is a memorial world in the Phaedra System, administered by the Blood Angels, with a tithe grade of Aptus Non.

Sacris is a feudal world of swamps and moorland in the Calixis Sector, and the recruiting ground of the Storm Wardens.

Sacristan is a frontier world in the Endymion Cluster, shown on maps of the Badab War.

Sagan is a minor location record placed under the Melchior System in Segmentum Obscurus, on Jambonium beside Melchior itself.

Sagan I is a numbered world in the Sagan System of the Karthago Sector, situated within the logistical area of the Badab War.

Sagan II is a world in the Sagan System, in the Maelstrom Zone, known for a prison hulk on its night-side.

Sagan III is an Administratum tithe-world and Karthan fleet anchorage in the Maelstrom Zone, contested during the Badab War.

Sagan IV is a numbered world in the Sagan System, associated with the Karthago tithe well during the Badab War.

Sagan V is an outpost world with indigenous feral inhabitants in the Sagan System of the Maelstrom Zone.

Sagan VI is a numbered world in the Sagan System, associated with the Karthago tithe well of the Badab War and distinct from Sagan III.

Sagan VII is a numbered world in the Sagan System, associated with the logistical support of the Badab War rather than with Sagan III.

Sagrifarri is a world known for its glass seas.

Saim-Hann, known as the Wild Host, is an Asuryani craftworld whose Wild Rider clans ride to war on jetbikes.

The Saint Kiodrus Catacombs are a subterranean tomb-complex on the shrine world of Lethe XI, within the Thracian Primaris system.

Salandraxis is an Imperial shrine world, also described as a clerical world, whose capital is a sacrosanct shrine city; no sector, system, or coordinates are…

Salash’hei is a world of the Farsight Enclaves made up of moon-sized globes of liquid that orbit the sun Emon’hai together.

Salinas is an Imperial world of the Paragonus sub-sector in Ultima Segmentum, placed by Imperial cartographers with medium confidence.

Salvation’s Reach is a hulk within a debris belt in the Rimworld Marginals, used as a Sekkite weapons laboratory; it is not a planet.

Sameter is a declining Helican agro-chemical world investigated by Inquisitor Gregor Eisenhorn over a series of ritual murders in 241.M41.

Sancour is a world in the Angelus subsector, the homeworld of Beta Bequin and the setting of Queen Mab, the Maze Undue and the City of Dust.

Sanctia is an Ecclesiarchy world; no segmentum or coordinates are recorded for it.

Sanctuary 101 is a barren world in the Vidar Sector on the Eastern Fringe of Ultima Segmentum, and the site of an Adepta Sororitas fortress-convent…

Sanctum is the homeworld of the White Templars Space Marine Chapter, a world of mountains, plains, and techno-barbarian tribes in the Formidyre System…

Sangua Terra is an Imperial hive world in the Nachmund Gauntlet and the keystone of the Sanctus Wall.

Saramanth was a master world of Ultramar during the Great Crusade, a Tetrarch seat alongside Macragge, Iax and Konor.

Sarkon is a Necron tomb world in the Ghost Stars whose damaged master program is the Sarkoni Emperor, core of the Empire of the Severed.

Sarum is a barren Maelstrom-side hell-forge of the Dark Mechanicum, whose Crimson Priests supplied arms to the World Eaters during the Horus Heresy.

Saturn is a restricted Inquisition fortress whose rings and moons are closed to ordinary Imperial traffic.

Saturnine is a fortress-bastion complex forming part of the Imperial Palace’s defensive perimeter on Terra.

Savaven was a cardinal world in the Quinrox Sound, destroyed by Abaddon’s Planet Killer at the opening of the Gothic War.

Savlar, charted as Savlar Penitens, is a toxic penal world a short Warp-jump from Armageddon, valued for its chemical deposits and convict manpower.

Scarato was a penal world of the Imperium that, during the Horus Heresy, fell under the dominion of the Sons of Horus, who imprisoned and terrorised…

Schrödinger VII is an ice world in the Vidar Sector of Segmentum Ultima.

Scintilla is the capital of the Calixis Sector, comprising two hives, a walking city, a gun-foundry town and an Inquisitorial fortress in the Tricorn.

Scintilla Prime is a low-confidence entry in Ultima Segmentum, distinct from Scintilla, the capital of the Calixis Sector.

Sebastus IV is a world recorded as the site of the Iron Cage, the battle fought in the immediate aftermath of the Horus Heresy, around 019.M31, between…

The Second Moon of Varsavia is a numbered moon in the Silver Skulls’ home system, orbiting the ice feral world of Varsavia.

Sedh is a frozen, polluted Necron frontier world of the Ithakas Dynasty, used as a place of exile for disgraced dynasts under Lord Oltyx.

Sentinel, also known as Drusus, is a shrine world in the Drusus Marches, characterised by a salt desert and a single ouslite tower five kilometres high.

Sephlagm was an irradiated hive world, and is now a dead world.

Septius VII is an Imperial hive world whose planetary defences were seized and misdirected by the renegade known as Cypher.

Serenade is an artificial world on the Eastern Fringe, known to the Necrons as Cephris and to the Aeldari as Cepharil.

Sesabo is a moon for which no parent world, segmentum, sector, or coordinates are recorded.

Sha’draig was a T’au colony, not a full sept, that lay in the path of Hive Fleet Gorgon.

Shadow of the Emperor is a starship of the Raven Guard Legion that served as flagship of Corvus Corax during the Horus Heresy.

Shaka VI is an Imperial world.

Shedim is the outer gas giant of the otherwise empty Grief System in the Maelstrom Zone, where the Betrayal at Grief took place.

Shemnoch is a Necron tomb world, the seat of a Necron dynasty.

Shenlong was a forge world in the Ultima Segmentum, its system and coordinates unrecorded, now a dead world without population after Exterminatus.

Sheol IX, called simply Sheol in one account, is a world of the Thramas Sector on the Eastern Fringe.

Siahl is a world attested in fragmentary Horus Heresy-era chronicles, associated with the Ultima Segmentum.

Sicarus is a Word Bearers daemon world in the Eye of Terror, its cathedral surface a crust of temples stacked upon temples above a largely subterranean city.

Sigma Pavonis is an Ultima Guard medicae world, presented in the Ciaphas Cain fiction as a hospital for traumatised Imperial Guard troops.

Sigma-Ulstari is an Imperial forge world and the only warden planet inside the Cordon Impenetra, which borders the Ork empire of Octarius.

Signus Prime was the capital of a seven-world industrial cluster until daemons turned it into a domain of Kyriss and Ka’Bandha.

Signus Tertiary was a minor mining world, the second planet of the Signus Cluster, and a waypoint in the mustering led by Sanguinius.

Simia Orichalcae is a promethium-bearing ice world where a Necron tomb was found beneath a refinery during an Imperial campaign against Orks.

The Sin of Damnation is a space hulk, with no coordinates recorded, and it is not recorded as a body of the Baal system.

Sinophia is a Periphery frontier world, formerly the personal fief of Rogue Trader Teresa Sinos and an Angevin staging world.

Siscia is a minor Imperial mining world in the Ophidian Sub-sector, described as a Celedin exporter of promethium.

Sixty-Three Nineteen is a false Terra brought to compliance by the 63rd Expedition after its self-crowned Emperor ordered Horus Lupercal to kneel.

Skalathrax is a daemon world in the Eye of Terror, known as the site of the battle between the World Eaters and the Emperor’s Children.

Skrynne is a jungle death world of the Calixis Sector on the Spinward Front, settled only after Storm Wardens spent a decade fighting its Orks.

Slaughterhouse III was an Ork slave-mining world attacked by the Lamenters during the Corinthian Crusade of 698.M41.

Solemnace is a Necron tomb world remade as an artificial Dyson shell, ruled by Trazyn the Infinite as the vault for his stolen armies and relics.

Solomon is a poisoned hive in the Markayn Marches, serving as the Munitorum’s seat in the Calixis Sector and as an anchor of the Angevin Crusade.

Solomonor is a location listed in the Segmentum Tempestus whose name resembles that of Solomon, a hive in the Calixis Sector.

Solon V is a world recorded for its crystal caves, with no coordinates, segmentum, or parent system recorded.

Somonor is a Necron tomb world of the Sautekh Dynasty in the Vidar Sector of Ultima Segmentum, on the Eastern Fringe.

Sortiarius is a world within the Eye of Terror that served as the refuge and stronghold of the Thousand Sons Legion after Prospero’s fall.

Sotha is an agri-world in Ultramar whose Mount Pharos conceals a Necron beacon, discovered by the XIII Legion in 882.M30.

Spectoris is an ocean agri-world in the Drusus Marches with a population of two million and a marine ecosystem hostile to anything foreign.

St.

Stalinvast is a hive world in the Segmentum Tempestus, the setting of Ian Watson’s novel Inquisitor, and was later written off by the Imperium.

Stel-Uit is an Aeldari craftworld about which almost no history has been published beyond its name and a colour plate.

Stygia is a dead world in northern Ultima, formerly a Knight world, whose population was devastated by a daemonic incursion.

Stygia-Aquilon is a pair of worlds, one of fire and one of ice, associated with the Executioners Chapter, with the asteroid fortress Darkenvault between them.

Stygies VIII is an Adeptus Mechanicus forge moon orbiting a gas giant in the Vulcanis system, prized for its Vanquisher cannons and gun barrels.

Styxia Prime is an Imperial agri-world of the Styxia System in the Eastern Fringes of the Ultima Segmentum.

The Sword of Sacrilege is a Despoiler-class battleship of the forces of Chaos.

Sycorax is a death world of Ultima Segmentum, held by the Adeptus Astra Telepathica as a training ground where psychic storms force adepts to shield themselves…

T’au is the arid homeworld of the T’au Empire, a single-continent planet in the Eastern Fringe whose savannah and marble cities anchor the Ethereal seat.

T’au’n was the first true offworld colony of the T’au Empire, settled in 756.M37 close to the homeworld.

Taladorn is an Imperial industrial world.

Talasa Prime is a fortress-world in Ultramar granted to the Deathwatch, which uses it as its principal training hall and Ordo Xenos stronghold.

Talasa Secundus is a hive-world in the Talasa System, within Ultramar, and is a separate location from the neighbouring Deathwatch keep.

Talassar is a storm ocean world in Ultramar.

Tallarn is a former Imperial agri-world reduced to desert by Iron Warriors virus bombs and the setting of the largest armoured battle in human history.

Tanakreg is an Imperial world in the Ghost Stars, devastated by the Word Bearers in the novel Dark Apostle during a conflict over a Necron tomb.

Tanith was a forest world in the Sabbat Worlds, its landscape dominated by nalwood, a species of tree capable of slow migration across the forest floor.

Taos III is an Imperial world, the birth world of Sebastian Vaarden, later Commissar Sebastian Yarrick.

Tarentus is a desert-agricultural location in Ultramar that shares both its land-use pattern and its Three Planets barycentre with Masali.

Targus VIII is an Imperial hive world, formerly held by Orks, on the fringes of the Halo Stars.

Tarinth was a world in the Elysia Sector of the Ultima Segmentum, without attested coordinates and not to be confused with the Drop Troops world of Elysia.

Taros is a desert mining world in the Ultima Segmentum that the T’au captured from the Imperium and renamed T’ros.

Tarsis Ultra was an agri-world named for Guilliman, reduced to a scoured rock in 999.M41 after a Tyranid assault and the release of the Heraclitus virus.

Tarsus was an Aeldari maiden world, later destroyed and classed as a dead world.

Tartarus is a world in the Corribra Sector of the Segmentum Tempestus, and the setting of the Blood Ravens’ war for the Maledictum relic in Dawn of War.

Tartoros was a world of the Cryptus system whose void domes were defended during the Cryptus Campaign of 998.M41.

Tash’var is a sept world of the T’au Empire’s Second Sphere Expansion, holding the frontier between Fal’shia and D’yanoi on the Empire’s south-eastern fringe.

Teghar Pentaurus is a world of the Imperium associated with the early Great Crusade service of Sanguinius and the IX Legion.

Tephaine is the hive world of the Tephaine System, on the edge of the Adrantis Nebula, within the Calixis region.

Tephaine Minor is an agricultural world in the Tephaine System of the Calixis Adrantis Nebula that feeds hive Tephaine.

The Terminus Est is a capital ship built on the shipyards of Luna and assigned to the Death Guard.

Terra is the capital of the Imperium and the birth-world of humanity, a hive world so built over that open ground is held only by the powerful.

Terraq is a penal world in the Caliban Subsector of Segmentum Obscurus, near the Eye of Terror.

Tesstra is a world of the Ultima Segmentum, remembered as the inner capital of the Tesstra Conservation, a totalitarian human alliance of the Great Crusade era.

Thanatos is an Oruscar tomb world that houses the Celestial Orrery, a device that maps stars and can damage them.

The Black Library is a Harlequin fortress-archive in the Webway that serves as the Eldar repository of forbidden lore.

The Elysian Gate is a Dark Age warp-door at Uranus, a three-thousand-kilometre parabolic aperture that allows ships to bypass Sol’s Mandeville points.

The Rock is the mobile fortress-monastery of the Dark Angels, a fragment of their shattered homeworld Caliban built around the peak of Aldurukh.

Thennos is a small world of the Sthenelus System, the home system of the Iron Hands, which it shares with Medusa.

Thessala is a world known chiefly as the site of the Battle of Thessala, fought in orbit above it in 121.M31 during the Great Scouring.

Thoas is a tidally locked world in the Ultima Segmentum where the Ultramarines destroyed an Ork empire during the Great Crusade.

Thracia is an Imperial world on which the Ultramarines Fourth Company fought during a Chaos-fuelled rebellion in late M41.

Thracian Primaris is a Helican hive world that became sub-sector capital in 241.M41 after authority passed from Gudrun.

Thramas was a war-torn region of the Eastern Fringe that gave its name to the Thramas Crusade.

Thrax is a Periphery frontier world in the vicinity of Calixis, claimed by the Severan Dominate and recorded on the Only War map.

Thrax is a forge world that daemons overran, and on which Marneus Calgar fought in 762.M41.

Tigrus, also written Tigris, is an Ultima forge that first built Vanquisher cannon, Fellblade accelerators and Hunter shells.

Tinek’la is a crystalline world of the Farsight Enclaves, home to Air caste T’au who live in floating habitation pods and orbital stations above it.

Titan, Saturn’s largest moon, is the concealed fortress-world of the Grey Knights and the site of the Citadel of Titan.

Titania is the largest moon of Uranus, placed in the Sol system on the Jambonium map as an outer-sphere body near the Elysian Gate.

Tizca, known as the City of Light, was the capital of Prospero and the principal stronghold of the Thousand Sons Legion.

Tochran is the world on which the Salamanders fought the Tochran Crusade in 943.M41 against Necron forces associated with Solemnace and Trazyn the Infinite.

Torhaven is an Imperial war world.

Toros Tertium is an Imperial fortress world in the Toros System of the Segmentum Obscurus, close to the sundered Cadian Gate.

Tourmalid is the capital world of the Diamor System, Segmentum Obscurus; no coordinates are recorded for it.

Tranch is an Adrantis hive and the birthplace of the Pale Throng, a mutant-psyker revolt of 807.M41 that overthrew the Oligarchs.

Tranquility is an unnumbered location entry in the Ultima Segmentum, distinct from the numbered worlds Tranquility II and Tranquility III.

Tranquility I is the first numbered world of the Tranquility System in the Endymion Cluster and is the least documented of the system’s worlds.

Tranquility II is a feudal desert world in the Tranquility System of the Maelstrom Zone, neighbouring the Mantis Warriors Chapter.

Tranquility III is a jungle death world in the Endymion Cluster, formerly used by the Mantis Warriors as a training ground in the Valley of the Nine Winds.

Treconondal is a world for which no segmentum and no star system are recorded; no coordinates are recorded for it either.

Triplex Phall is a forge world on the Eastern Fringe that outlasted its sister forges Galatia and Thule.

Trisolian is a world of the Segmentum Solar attested in connection with the era of the Horus Heresy, though details of its role remain sparse.

Triton is a moon of Neptune that was mined for corvinium and later infested by a Genestealer cult beneath its ice.

Tsadrekha is an Imperial hive world; no segmentum, system, or coordinates are recorded for it.

Tsagualsa, the Carrion World, is a Night Lords quarry planet on the Eastern Fringe and was the seat of Konrad Curze after Nostramo.

Typhon is an unnumbered location entry filed under the Ghost Stars, distinct from Typhon Primaris, the Dawn of War II world in Subsector Aurelia.

Typhon Primaris is a Blood Ravens jungle world in Subsector Aurelia, distinct from the Ghost Stars location that some maps label Typhon.

Typhon Septimus is an ice world in the Typhon System of Subsector Aurelia, appearing in the Dawn of War II wargear narrative Fist of Valhalla.

Tyran is an ocean world on the Eastern Fringe, remembered as the site whose destruction in 745.M41 gave the Imperium its name for the Tyranids.

Tyrant’s Gate is a Red Corsairs base in Imperium Nihilus, a world of vice-cities that Huron Blackheart ringed with orbital docks.

Ullanor was the capital world of the ork empire of Urlakk Urg and the site of the Triumph at which the Emperor named Horus Warmaster.

Craftworld Ulthwe is an Aeldari craftworld that orbits near the Eye of Terror, standing as a bulwark against the warp rift it borders.

Ultra Maximus is a world of the Imperium in Ultima Segmentum.

Ulvheim is the arid homeworld of the Wolfspear Chapter of the Adeptus Astartes.

Uralan is a world that holds the Tower of Silence, a shifting labyrinth in which the Chaos Gods keep what they will not leave abroad.

Uranus is an uninhabitable ice giant in the Sol system, notable for the Elysian Gate, a Dark Age warp-door that bypasses the system’s Mandeville points.

Urbitane is a city on Sameter, in the Gudrun System, noted for an investigation into the murders of missing-in-action war veterans.

Urdesh is a forge world in the Sabbat Worlds whose armouries and allegiance have been contested since the era of the Horus Heresy.

The Urdesh forges are the great weapons-manufactory districts of the forge world Urdesh, in the Sabbat Worlds.

Urk is an Ork world in the Zornian System of Segmentum Solar.

Urum is a Crone World in the Eye of Terror and the laboratory domain of Fabius Bile, also labelled Fabius Bile’s World on the map.

Utochre is the eighth moon of Cyto, within the Helican Subsector of the Scarus Sector.

Valhalla is an ice-bound Imperial world in Imperium Nihilus, renowned as the source of the Astra Militarum’s Ice Warrior regiments.

Valos is a barren dead world on the Eastern Fringe, south-east of Ultramar, devastated in the Horus Heresy and again by Hive Fleet Behemoth in late M41.

Varasine is an Imperial world with a population of some seven billion whose Astra Militarum defenders fought a Tyranid invasion.

Varsavia is a cold feral world near the Gildar Rift and the current home of the Silver Skulls Space Marine Chapter.

Vash’ya is a T’au world of the Second Sphere, terraformed so slowly that it became an Air Caste dockyard before it became a breathable colony.

Vaxanide is a hive in the Malfian Sub-Sector on the Calixis rim, governed from Hive Vaxanhive by House Vaxanide.

The Vengeful Spirit is a Gloriana-class battle-barge that served as the flagship of Warmaster Horus during the Great Crusade and the Horus Heresy.

Venus is an industrial world of cloud-hives in the Sol System, reshaped from a volcanic environment into a working planet of the Imperium.

Verghast is a hive-industrial world in the Sabbat Worlds, known for the siege of Vervunhive by Chaos forces during the Sabbat Worlds Crusade.

Vernalis is a barren mining world in the Segmentum Obscurus.

Vervunhive was the principal hive city of Verghast, an industrial world of the Sabbat Worlds, and the site of a major siege during the Sabbat Worlds Crusade.

Vhaloth IV is a world for which no segmentum, sector, system or coordinates are recorded.

Victorix is an Imperial shrine world.

Vigilus is a dry hive world on the Nachmund Gauntlet, one of the few stable crossings of the Great Rift.

Vikurus was a shrine world whose capital was named Absolom.

Vilamus is a planet of the Imperium of Man, recorded as a fortress world of the Marines Errant and as a target of Red Corsairs raiding.

Vior’la is a binary-star world of the T’au empire’s Fire Caste, its name meaning ‘hot-blooded’ in reference to the plasma storms that scour its skies.

Vior’lus, also called Vior’los, is a volcanic world of the Eastern Fringe and the capital of Commander Farsight’s Enclaves.

Volistad is a feudal world in Segmentum Tempestus, terraformed by the Adeptus Mechanicus in M35 and rediscovered in M39 during a nuclear civil war.

Volonx, also rendered Voloxx, is a feral world of Adrantis recorded in the Calixis gazetteer.

Volpone is an Imperial world best known as the homeworld of the Volpone Bluebloods, an aristocratic regiment of the Astra Militarum.

Voltemand is a civilised Sabbat world, captured at an early stage because it opened a road into the heart of the sector.

Voltoris is an Eastern Fringe knight world of House Terryn, its surface a scatter of continent-islands set within a single green ocean.

Voss is a forge world in the Segmentum Solar, founded in the Age of Strife and known for producing Malcador tanks.

Voss Prime is an Adeptus Mechanicus forge world in the Mordan Belt, nearest to Armageddon, and is known as the Right Hand of Mars.

Vostroya is an industrial world of manufactoria and Techtriarchs, whose firstborn sons serve in the Imperial Guard in settlement of a debt.

Vraks Prime was the armoury world of the Scarus sector, its only inhabited planet, and the site of an eighteen-year siege.

Vraks Secundus is a dead world in the Kerak Sub-sector, mapped by Rogue Trader Van Meer and never settled.

Vraks Tertius is an uninhabited dead world with a single moon, recorded as one of two such worlds in its system.

Watch Fortress Erioch is a Deathwatch fortress-monastery in the Jericho Reach, the order’s principal base in that frontier region.

Watch Station Andronicus is a Deathwatch listening post and kill-team staging station in the Andronicus System, in the Canis Salient.

The World-Prince’s world is the unnamed planet of the World Prince Campaign of 999.M30, remembered for the confrontation between Rogal Dorn of the Imperial…

Wyrmwood is a mechanical daemon world in the Idolatros system, in the Somnium Stars.

Xalladin is an Imperial world of the Xalladin System.

Xana II is a forge world of the Adeptus Mechanicus, known chiefly for its part in the Horus Heresy-era schism of Mars.

Xenobia was a frontier world of the Interex, whose capital, Xenobia Principis, stood on the shore of a wide ammonia sea.

Yaelis is a hive world of the Thramas Sector on the Eastern Fringe.

Yarant is a world in the Segmentum Solar, the site of the engagement known as the Wolf Cull.

Yarant I is the first numbered planet of the Yarant system in the Segmentum Solar, where the Horus Heresy engagement known as the Wolf Cull took place.

Yarant III is a Segmentum Solar world and the site of the Wolf Cull, a Horus Heresy siege of Leman Russ and the Space Wolves by traitor forces.

Yarant IV is the fourth numbered world of the Yarant system in Segmentum Solar, associated with the Wolf Cull of the Horus Heresy.

Yme-Loc is a lesser-known Eldar craftworld of Vaul-cult smiths, whose hosts are coloured grey and orange.

Ynyx was a Mechanicum production world during the Great Crusade.

Yssimae was a primitive human world on the fringes of the Imperium, its location never charted with any precision, known chiefly for the brief and calamitous…

Zaebus Minoris is the concealed feral homeworld of the Red Scorpions Chapter, located in the Ordon Rift.

Zaisuthra is a craftworld that fled the Fall of the Aeldari and developed within the webway rather than on any named system or in any named segmentum.

Zalathras is a world besieged by Orks in 797.M41.

Zandros is the wreck of a lost Eldar craftworld, remembered chiefly as the site of the Slicing Orbs Aspect shrine and of duels among the Phoenix Lords.

Zantragora, also spelled Zantragorra, is a Necron tomb world in Ultima that serves as a Cryptek laboratory planet.

The Zar-Quaesitor is the flagship of Archmagos Dominus Belisarius Cawl, a void-ark and mobile laboratory for the production of Primaris Space Marines.

Zaramund is an Imperial world in the Zaramund System, in Segmentum Obscurus, fairly close to Caliban.

Zayth is a Heathen Stars war-world in the Koronus Expanse whose people live inside city-sized land-ships on a poisoned macro-continent.

Zenta Malhyde is a location in the Ultima Segmentum where Zygmunt Molotch excavated Enuncia, the language that unmakes things.

Zero is a world in the Imperium Nihilus, the part of the Imperium cut off from the light of the Astronomican by the Great Rift.

Zhao Arkkad is a toxic rainforest death-forge world of Segmentum Tempestus, its forge complexes driven entirely underground.

Zhoros was the first home world of the Fire Hawks Chapter, destroyed by Frateris Templar thermal bombs during the Age of Apostasy.

Zillman’s Domain is a Josian feudal world governed by a king whose authority rests on his ownership of a lasgun, an energy rifle.

Zoran is an Imperial ice world.

The Eternity Gate is one of the principal gates of the Imperial Palace on Terra, guarding approaches to the Emperor’s Sanctum.

The Fist of Iron was a warship of the Iron Hands Legion, active during the Great Crusade and the Horus Heresy of the late thirty-first millennium.

The Golden Throne is the great life-sustaining engine beneath the Imperial Palace on Terra upon which the mortally wounded Emperor of Mankind has rested since.

Graia is a forge world of the Adeptus Mechanicus, known as the Crown of Miracles for the density of its manufactorums and the Titans raised in its yards.

Hive Helsreach is a hive city of Armageddon Secundus, on the world of Armageddon, besieged by Ork forces during the Third War for Armageddon in 444.M41.

Lochos is a world of Ultramar, the star-dominion built by the Ultramarines Legion in the Ultima Segmentum during the Great Crusade.

Macragge’s Honour is a Battle Barge of the Ultramarines Chapter, one of the largest warships in the Adeptus Astartes fleet and flagship of Roboute Guilliman.

New Cadia is the name attached to proposals for a successor homeworld for the Cadian diaspora after the destruction of Cadia in 999.M41.

Phall is a minor world of the Phall system in the Ultima Segmentum, known chiefly as the site of a space battle fought in the opening days of the Horus Heresy.

Quan Zhou is a fortress world of Segmentum Pacificus, counted among the tributary worlds bound to Chogoris, home world of the White Scars Space Marine Chapter.

The Fang is the fortress-monastery of the Space Wolves Space Marine Chapter, hewn into a mountain of the same name on the Asaheim continent of Fenris.

The Webway is a vast, labyrinthine dimension of interlocking passages constructed by the Aeldari to permit near-instantaneous travel between worlds.

A webway gate is a stabilised portal linking realspace to the webway, the extradimensional network of eldar-wrought pathways spanning the galaxy.