The Jupiter Icy Moon Explorer (JUICE) was a planned European Space Agency (ESA) spacecraft to visit the Jovian system, focused in particular on studying three of Jupiter's moons; Ganymede, Callisto, and Europa. It will  characterise these worlds, all thought to have significant bodies of liquid water beneath their surfaces, as potentially habitable environments. Selection of the mission for the L1 launch slot of ESA's Cosmic Vision science programme was announced on May 2, 2012 (Pre Astro Space exploration activity)
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