Saturn’s moon Dione has joined the growing list of watery bodies in our solar system.
Data from NASA’s Cassini probe indicate that a liquid ocean some 20 miles deep exists far below the icy surface of the moon. This means that its interior looks similar to two other Saturnian moons, Titan and Enceladus, both of which hide vast oceans beneath a thin crust of ice. Dione is likely different in at least one respect though: the data indicate it’s ocean buried much deeper.
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