Jupiter Ganymede Orbiter
Jupiter Ganymede Orbiter was a part of the international Europa Jupiter [System Mission]. It was a proposed orbiter by the ESA slated for lift-off in 2020. Plans for the mission include detailed studies of Jupiter's moons, Ganymede and Callisto, as well as the Jovian magnetosphere.
It was superseded by the Jupiter [Icy Moons Explorer] in April 2012.