SUMMARY: NASA has chosen Northrop Grumman Space Technology to build its upcoming Prometheus Jupiter Icy Moons Orbiter (JIMO) spacecraft, and awarded them a $400 million contract to cover costs up to 2008. JIMO will use a nuclear-powered ion engine to go into orbit around each of Jupiter's icy moons: Callisto, Ganymede, and Europa. Once in orbit, the spacecraft would be able to examine each of the moons in great detail with a suite of instruments to try and understand their composition, history, and if there could be conditions for life.
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