Subsector Solar

Subsector Solar is the inner administrative cube of Sector Solar that holds the Sol System, Terra's own neighbourhood rather than Segmentum Solar the half-galaxy. Sedna, Quaoar, Haumea, and a belt of outer rocks share this chart as sibling pins.

The Adeptus Terra, Mars, and the Astronomican all sit one level down in sol-system. This row is the paperwork around that well, not a second name for the Segmentum.

Subsector Solar still matters because Terra's address is a nested cube, not a single planet. Unofficial maps keep the sector-solar parent and do not reparent Sol here.