Pluto - Plutonian System
Pluto was, until the 2006 recatagorization, the 9th planet in Sol System and currenty hold the classification of planetoid. Pluto and it's moons currently hourse a number of science and mining outposts. However, these are long term habitation facilities, not permanent habitats for humanity. Largest science outpost is within the Serenity Chasm of Charon.
Type
Planetoid