Ork Adaptability

Greenskin society and ecology is so robust that it can exist almost anywhere, which is why their settlements have been found scattered to the furthest corners of the galaxy. The Imperium has encountered Orks and their kind living – even prospering – in such extreme
environments as toxic death worlds, newborn planets still heaving with volcanic activity, or the depressurised carcasses of abandoned orbital platforms. Ork hordes have been found inhabiting drifting ice floes, or infesting irradiated asteroid fields perilously close to active stars. They have been discovered amid corrosive chemical swamps, on lightless nightmare worlds seething with horrific predators, even in the bombed-out remains of planets subjected to Exterminatus. It is rumoured amid the Imperium’s Rogue Traders that there are even Ork enclaves hidden within the Eye of Terror itself, though most dismiss this as the ravings of
madmen.

- Codex: Orks 7E, page 11