Bruce Murray Space Image Library

Jupiter's Galilean Moons

Jupiter's Galilean Moons
Jupiter's Galilean Moons NASA's Galileo spacecraft captured these images of Jupiter's four largest moons. From left to right, they are shown in order from outermost to innermost: Callisto in 2001, Ganymede in 1997, Europa in 1998, and Io in 1997. NASA / JPL / Ted Stryk

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