Galileo images and mosaics of Europa |
Galileo images and mosaics of Europa |
Aug 22 2005, 04:03 AM
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#101
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I have worked on sprucing up some global views of Europa from Galileo. There are a few more global views I hope to get to eventually. But the best two at nearly full phase benefited a lot.
[Moderator note: There are several more threads containing Galileo Europa images but they all contain several inactive image links. The main threads are: http://www.unmannedspaceflight.com/index.php?showtopic=2016 http://www.unmannedspaceflight.com/index.php?showtopic=2174 http://www.unmannedspaceflight.com/index.php?showtopic=2222 http://www.unmannedspaceflight.com/index.php?showtopic=2082 http://www.unmannedspaceflight.com/index.php?showtopic=2142 ] -------------------- |
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Feb 20 2015, 06:59 PM
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#102
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Please correct me if I'm wrong, but I thought that the hemispheric color asymmetry was thought to be due to the leading hemisphere being subjected to the brunt of Jupiter's radiation belt as the moon orbits thus causing decomposition of volcanic effluent deposits from Io (which aren't subjected to that on the trailing hemisphere & therefore persist.)
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Feb 20 2015, 08:25 PM
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#103
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Junior Member Group: Members Posts: 20 Joined: 22-February 06 Member No.: 688 |
Please correct me if I'm wrong, but I thought that the hemispheric color asymmetry was thought to be due to the leading hemisphere being subjected to the brunt of Jupiter's radiation belt as the moon orbits thus causing decomposition of volcanic effluent deposits from Io (which aren't subjected to that on the trailing hemisphere & therefore persist.) Its slightly more complicated than that. The Jovian magnetosphere rotates faster than Europa's orbital velocity at Europa's orbital radius. As a result, Europa is getting bombarded by charged particles on it's orbital trailing hemisphere. It is also picking up uncharged particles and dust from it's orbital motion on the leading hemisphere. One obvious result of this is the hemispheric color/albedo contrast. I knew that the orbital trailing hemisphere showed signs of enhanced "weathering" but I did not realize the magnitude of the contrast. Bjorn's processing really brings this maps alive for me. -------------------- UMSF Newbie since 2006.
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