Ganymede

Ganymede (aka Sol Vc) was a natural satellite, or moon, of Jupiter.

It was one of the four so-called Galilean moons (the others were Callisto, Europa and Io) discovered by Galileo Galilei in the 17th century.

The Earth colony Ganymede Triad 6 had been established by the 23rd century. The family of Gretchen Jaeger were residents of the colony. (: The Dianasian Gift)