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Sunday, November 22, 2009

Photo: Icy Moon Tethys Had Ancient Underground Ocean


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Saturn's rings appear to slant above the icy moon Tethys in an image taken on October 29, 2007, by NASA's Cassini spacecraft.

New research suggests that the seemingly ordinary moon is among a handful of natural satellites thought to have hosted a subsurface ocean.

Image courtesy NASA/JPL/Space Science Institute