Extraterrestrial settlement

Extraterrestrial settlement can be any type of permanent habitation outside of Earth, beyond its space boundary, such as:

Space settlement
*Orbital space station
*Cycler
*Interstellar ark
**Generation ship
Extraterrestrial surface settlement
*Moonbase
*Mars base
Extraterrestrial floating settlement
*High Altitude Venus Operational Concept
Extraterrestrial submerged settlement