Source: "Europa Jupiter System Mission"/NASA/JPL

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Learn about key places to search for life beyond Earth in this video from NASA. The Europa Jupiter System Mission, a proposed joint venture between NASA and ESA (the European Space Agency), would send two spacecraft to study Jupiter and its four largest moons: Europa, Ganymede, Callisto, and Io. Simulations show the locations of the moons' subsurface oceans and how spacecraft could collect valuable information about habitable environments in our solar system.