|Map||Basic Data||Planetary Image|
|Class:||Destroyed, former Adeptus Astartes Homeworld|
This planet allegedly existed in one of Earth's closest neighbouring systems. Being within reach even for non-warp spacecraft, Cthonia had been colonised, built upon, tunneled and mined probably since the dawn of space travel. As such, all natural resources had been stripped away and used up millennia before, and the ancient mining technology had long since been rediscovered and removed by the Adeptus Mechanicus of Mars. The planet that remained was largely redundant and abandoned, completely riddled with catacombs, crumbling industrial plants and exhausted mine-workings. The planet was notorious for the vicious gangs and slums.
- 1: Index Astartes IV, [Needs Citation]
- 2: Codex: Space Marines (3rd Edition), [Needs Citation]
- 3: Warlords of the Dark Millennium: Abaddon the Despoiler (Background Book),[Needs Citation]