CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Structure of Enceladus. Cutaway computer artwork showing the interior of Enceladus, the sixth largest of Saturn's moons. The surface of Enceladus is thought to be a thick layer of water ice (blue) covering the hard rocky interior. It is thought that Enceladus is recently active with 'water volcanism' (cryovolcanism), and jets of water can be seen spouting from fissures in the icy layer.
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