A colony is a perminant settlement on one of the planets or moons of the solar system. The first and most influential colony is Luna which was established in the Twenty First Century. Due to the rapid decline of Earth many new colonies were founded in subsequant years and now make up the perminant homes for the human dispora.
There are many colonies in the solar system, sometimes sharing the same moon or planet. There are two kinds of colonies, those that are on terraformed planets or moons such as Mars and Titon, and those that are in self contained biospheres. Examples of the later include colonies on Pluto and Ganymede.