News & AnalysisPlanetary Science

Cassini Plumbs the Depths of the Enceladus Sea

Science  04 Apr 2014:
Vol. 344, Issue 6179, pp. 17
DOI: 10.1126/science.344.6179.17

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Orbiting Saturn, Cassini had "tasted" the plumes of salty water that spew from Enceladus's south polar region, so scientists had growing confidence that the plumes tap briny liquid water tens of kilometers beneath the surface. Now, analyses of Cassini measurements of undulations in Enceladus's gravity field point to a 10-kilometer-thick layer of water beneath the south polar region, if not the entire moon.