29-30 August 2007 Icy Satellites (rev 49), Last stop on the road to Iapetus |
29-30 August 2007 Icy Satellites (rev 49), Last stop on the road to Iapetus |
Aug 9 2007, 10:40 PM
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SewingMachine Group: Members Posts: 316 Joined: 27-September 05 From: Seattle Member No.: 510 |
CICLOPS' Rev 49 Looking Ahead page is up. Highlights include a fourth monthy Voyager-class encounter with Tethys with 500m resolution over Odysseus (finally!)
Detailed mosaics of Rhea's prominent ray crater and points west are on tap for Old Scabby's second closeup. This should be a really cool periapsis passage to tide us over until the 10th of September. -------------------- ...if you don't like my melody, i'll sing it in a major key, i'll sing it very happily. heavens! everybody's all aboard? let's take it back to that minor chord...
Exploitcorporations on Flickr (in progress) : https://www.flickr.com/photos/135024395@N07/ |
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Sep 1 2007, 11:24 AM
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
The floor of the "young" ray crater on Rhea is really interesting.
http://ciclops.org/view.php?id=3713 Eastern part shows many small craters, but it seems that giant landslides completely covered the western floor where no craters are visible anymore. The ray crater seems indeed young and the landslides even younger. The landslides or "snow flows" remind me a little bit what is happening on Jupiter's moon Callisto. Both Rhea and Callisto are considered as the boring moons in their respective satellite system. I think it is really not the case. Marc. |
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Sep 1 2007, 03:21 PM
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Both Rhea and Callisto are considered as the boring moons in their respective satellite system. I think it is really not the case. Yeah...I think you're right, Marc. Rhea may look bland globally, but these close-ups are revealing an amazing amount of complexity at smaller scales. The sheer number of linear features is really remarkable, as UGordan observed. Beginning to wonder how many of the features that look like crater chains might actually be collapsed "cryolava tubes" dating back to Rhea's boisterious youth... -------------------- 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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Sep 1 2007, 06:56 PM
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
The sheer number of linear features is really remarkable, as UGordan observed. See, now, I'm beginning to wonder if I'm a ghost and no one sees my posts except for me, LOL... I have been trying to get a discussion going about the linear features and "crater chains" on Rhea for something like a year and a half, if not longer, and not a single person has ever responded to my comments. Now it's ugordan who's noticed these things? I remember taking images of Rhea and using my primitive image-processing skills and tools to outline the large chains, and then pointing out how these same structures seem to persist all the way down to the smallest visible scales. If I remember right, this was some time in early 2006. I've revisited the topic pretty much every time we get more decent Rhea images. Am I actually going mad and remembering things I never did? That said... ...I am very, very interested in whether these features are endogenic or exogenic. If endogenic, Rhea becomes an extremely interesting little moon. Even if exogenic, you have to explain how so many crater chains, of all sizes and varieties, show up on this moon while they show up only much more rarely on the other moons of Saturn. -the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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