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Jupiter's Moons: Some Icy, Some Volcanic, And Some Larger Than Our Moon | Video

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Published on Nov 8, 2012

Galileo discovered Io, Ganymede, Europa and Callisto, Jupiter's four largest moons in 1610. Even today their varied characteristics fascinate astronomers. From giant volcanoes to sub-surface seas, Jupiter's moons are like planets unto themselves.

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