The Halo Stars

The Halo Stars are the named outer rim of Segmentum Obscurus, a thinly scattered halo of ancient suns the Imperium treats as haunted rather than as a random unexplored dump.

Koronus and the Calixis rim sit against this dark; expeditions into the Halo Scar often do not return. Furibundus, Concanid, and the Weeping and Turbulent stars are the researched wells on this chart.

The Halo Stars still matter as the Obscurus edge wilderness, not as a synonym for the Ghost Stars. Unofficial maps keep the Obscurus parent and refuse to flatten this pin into Calixis.