Barren Rock

Airless, geologically stable barren rocks offer the simplest colonization equation in the galaxy: no atmosphere to contend with, no weather events, no hostile biosphere, and a surface littered with metal and crystal deposits exposed by billions of years of unprotected micrometeorite erosion. Standard vacuum habitat kits establish a functional colony within hours, and the Open Crust trait means extraction equipment reaches productive ore seams without the deep drilling required on atmospheric worlds. Habitability is functionally zero for unprotected humans, but the colony infrastructure investment is the lowest of any non-temperate world type.