The largest of Mars's two moons, Phobos has a few small mining outposts, as well as a large spaceport. This spaceport is used as a hub to export all of the ores and manufactured goods from mars. It is Mars's primary spaceport, Mars's secondary spaceport being one at the top of an orbital elavator at Mars's equator. Phobos has a population of 800, but thousands of people pass through the spaceport every day.
Demios has nothing but a small Space-Traffic control post for the spaceport on Phobos. It manages the departure's and arrival's of all spacecraft coming to mars, and has a crew of 14, who stay there for a week at a time before the crews are rotated. There are also a few failed mining outposts on Demios, but they are now deserted, although they occasionally used by smugglers as drop off locations for illegal cargo, until it is retrieved by the buyer of the cargo.