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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