Ganymede is the seventh satellite of Jupiter and the largest moon in the solar system. It is one of the "Galilean moons", the four largest moons of Jupiter that were discovered by Galileo Galilei.
It is the only moon with any magnetosphere making it the only place where dome-grown crops stood a chance in Jupiter's harsh radiation belt. It can be thought of as a place of harvest, and definitely a lynch pin in food economy in the belt. Large mirrors were placed around the planet, most likely to supply the Sun's light to the surface for crop growth.
It claims the lowest amount of birth defects and stillbirths. This being the case, many women come to Ganymede to deliver. It is the center of what made human expansion to the outer planets possible.
Ganymede Station was one of the first permanent human settlements in the outer planets, built as a long term colony with large domes filled with food crops. It is known as the safest station in the Jovian system.
The surface gravity of Ganymede is around 0.15g.