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Europa Report: Jupiter's Icy Moon Explained (Infographic)

Infographic: Jupiter's moon Europa has a huge underground ocean.
Scientists are eager to learn if Europa's huge subsurface ocean harbors alien life. (Image credit: by Karl Tate, Infographics Artist)

In 1610, when Galileo Galilei turned his telescope toward Jupiter, he saw four tiny points of light accompanying the planet. These are the Galilean satellites, the four largest of the 67  known moons of Jupiter. The smallest of the Galileans is Europa.

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