The smooth area at left resulted from ooding by a uid

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Unformatted text preview: nterior or implanted by impact. Long, dark lines are fractures in the crust, some of which are more than 3,000 kilometers (1,850 miles) long. The bright feature containing a central dark spot in the lower third of the image is a young impact crater some 50 kilometers (31 miles) in diameter. The right image shows a close-up view of the icy surface of Europa. The smooth area at left resulted from flooding by a fluid which erupted onto the surface and buried ridges like those at right. Europa may house a deep liquid water ocean NASA/JPL 21 Geologic features on the surface might be explained by a layer of liquid water with a possible depth of more than 100 kilometers below a cold, brittle surface ice crust. If a 100 kilometer (60 mile) deep ocean existed below a 15 kilometer (10 mile) thick Europan ice crust, it would be 10 times deeper than any ocean on Earth and would contain twice as much water as Earth's oceans and rivers combined. Cracks and fissures on surface – upwelling? Tidal heating not as strong as on Io. Ganymede ‣ Largest moon in the solar system ‣ 8% larger diameter than Mercury ‣ Twice the mass...
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This note was uploaded on 10/23/2013 for the course ASTR 100 taught by Professor Dunne during the Fall '12 term at University of Illinois, Urbana Champaign.

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