Subsurface sea hides below ice of Saturn moon

Subsurface sea hides below ice of Saturn moon

Gravity maps of Enceladus reveal liquid water ocean beneath satellite’s south pole

By Christopher Crockett, 11:17 AM April 3, 2014

Scuba divers take note: an underground ocean awaits on a moon of Saturn. Astronomers have, for the first time, measured the depth and extent of a subsurface sea on the ice-covered moon Enceladus. The findings shore up the notion that an underground reservoir feeds the moon’s ice geysers and raise questions about Enceladus’ habitability.

For a long time, astronomers thought the 500-kilometer-wide Enceladus was an unchanging, dead world. But the Cassini spacecraft, which arrived in 2004, found a...

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