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.
A predator native to the moon was the Ganymedian wompbat. (Orion Press: The Dianasian Gift)
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)
- In the Star Fleet Battles continuity, there was only one colony, devoted to mining. It had a population of 1.8 million. (Star Fleet Universe: Gazetteer Based on F&E Map, 14 August 2012 revision)
In the late 24th century, a class of starships named after natural satellites in the Sol system was commissioned. One of these was the USS Ganymede. (Star Trek: Titan novel: Orion's Hounds)