**This is a later game feature.
When a world is generated 1-5 Moons or Astroids (natural satellites). These would be limited sized lunar or astroid worlds (or it could pick a random world such as mars/water in rarer cases).
In the later game you could create some sort of ship station, this would use some rockets fuel electricity and other things (or something like the deployment station) and in return you could access one of these Moons/Astroids and make another settlement. Other benefits could be reduced export costs (cause of gravity) or even new resources
Wowza, a simi modder and an idiot? crazy
Moons are a maybe. I suppose it would not be terribly difficult to implement. I'll think about it. This goes for @spamdude as well, who asked something similar.