Europa Has More Water Than Earth's Oceans
Europa, the sixth-closest moon of Jupiter, was first discovered by Galileo Galilei. Galileo spotted the icy moon, which sits 390,400,000 miles from Earth, on January 8, 1610. Europa is the 4.5 billion-year-old moon of Jupiter covered in icy oceans and significant cracks, which scientists believe could possibly be the result of flowing water.
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