lecture18 - 1 Extraterrestrial Life: Spring 2008 Enceladus...

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Unformatted text preview: 1 Extraterrestrial Life: Spring 2008 Enceladus Small (~500 km diameter) moon of Saturn - orbits between Mimas and Tethys Two distinct hemispheres: northern is quite heavily cratered (old) southern shows almost no craters across wide area Albedo is almost 100% - icy surface must be very freash Extraterrestrial Life: Spring 2008 Enceladus north pole as views by Cassini during last week s Fyby of the satellite. Extraterrestrial Life: Spring 2008 Enceladus orbits within, and appears to be the source of, Saturn s faint E ring. Ejects icy particles into the ring, some of which are later re-accreted by the satellite (note: ring particles are fully exposed to sunlight, so chemistry can happen driven by this exposure). Extraterrestrial Life: Spring 2008 Surface of Enceladus that is devoid of craters resembles Europa - appears to have tectonic activity Extraterrestrial Life: Spring 2008 Surface of Enceladus that is devoid of craters resembles Europa - appears to have tectonic activity...
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This note was uploaded on 08/31/2009 for the course GEOL 3300 taught by Professor Staff during the Spring '08 term at Colorado.

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lecture18 - 1 Extraterrestrial Life: Spring 2008 Enceladus...

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