Jupiter Ganymede Orbiter (JGO) was a part of the international Europa Jupiter System Mission (EJSM).

[3] It was a proposed orbiter by the ESA slated for lift-off in 2020.

[1] 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It was superseded by the Jupiter Icy Moons Explorer in April 2012.

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