Astronomy Picture of the Day
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November 25, 1995
Saturn's Cleanest Moon: Enceladus
Saturn between the smaller
Mimas and the larger
Enceladus is composed mostly of water ice and has the cleanest and purest
ice surface in the
Solar System. It's surface therefore appears
nearly white. The surface also has many unusual groves and relatively few
Ganymede. This indicates that the surface is young
and/or newly reformed. To explain this, some astronomers speculate that
Enceladus is susceptible to some sort of
volcanic activity. Enceladus was
originally discovered in 1789 by
Tomorrow's picture: A Star Where Photons Orbit
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