Ganymedeball is a moonball of Jupiterball. It is the biggest moon in the solar system and can into magnetosphere. It may have a subsurface ocean like Europaball, but is less likely to have life due to its distance from the Sun and dangerous proximity to Jupiter.
He posseses a small metallic core and large amounts of water ice, making him less dense than most other objects in the solar system.
Orbit - Rotation