New Rings Of Uranus |
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New Rings Of Uranus |
 Jan 28 2006, 05:59 PM
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#16
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 Senior Member  Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430  |
QUOTE (Rob Pinnegar @ Jan 28 2006, 12:31 PM) Surprising that this hasn't been referenced in these threads, as people here generally remember that kind of thing. The 20th anniversary was just a few days ago -- I completely missed it. I guess it's been sort of overshadowed in everyone's minds by the 20th anniversary of you-know-what (which is today).   No, we did not forget the historic event before the Challenger Tragedy: http://www.unmannedspaceflight.com/index.p...indpost&p=38008 -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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| Guest_PhilCo126_* |
Jan 28 2006, 06:09 PM
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#17
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Guests |
I never forget the anniversaries of Voyager or Pioneer milestones as it gives a good opportunity to write another article about those superb travellers
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| Guest_AlexBlackwell_* |
Feb 16 2006, 05:50 PM
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#18
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Guests |
QUOTE (AlexBlackwell @ Dec 22 2005, 08:01 PM) This refers to the following paper, which was published online today in Science Express: The Second Ring-Moon System of Uranus: Discovery and Dynamics Mark R. Showalter and Jack J. Lissauer Published online December 22, 2005; 10.1126/science.1122882 (Science Express Research Articles) Abstract Supporting Online Material The final version of the paper, and an accompanying Perspectives piece by Carl Murray, is being published in the February 17, 2006, issue of Science. Note, too, that the Showalter and Lissauer paper made the cover. Note: As I post this, I don't think the online embargo for this issue, which permits full access to the papers, has been lifted yet. I believe this is an automated feature of the website. Access should be available in a few hours. |
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Apr 7 2006, 03:18 PM
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#19
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 Member Group: Members Posts: 531 Joined: 24-August 05 Member No.: 471 |
- http://www.newscientistspace.com/article/d...rkling-ice.html (Blue ring of Uranus linked to sparkling ice)
--- Before this discovery, the only known blue ring was Saturn's E-ring. It also has a moon orbiting at its heart – Enceladus - which spews out water vapour to generate the E-ring. Mab is surely too small to sustain similar activity, being only 15 kilometres across compared to 500 km for Enceladus. Instead meteorite impacts probably chip ice off the frozen surface to feed the ring. --- Illustration: 
-------------------- - blue_scape / Nico -
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Apr 7 2006, 03:22 PM
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#20
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
QUOTE (SigurRosFan @ Apr 7 2006, 11:18 AM) Before this discovery, the only known blue ring was Saturn's E-ring. It also has a moon orbiting at its heart – Enceladus - which spews out water vapour to generate the E-ring. Mab is surely too small to sustain similar activity, being only 15 kilometres across compared to 500 km for Enceladus. Instead meteorite impacts probably chip ice off the frozen surface to feed the ring. So why aren't other rings with moons embedded in them also blue? If all that is required are meteorite impacts knocking off moon pieces rather than full-scale geysers, why don't we see more blue rings? Has anyone checked to see if Neptune has any blue rings? Shall I presume that Jupiter does not? -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Apr 9 2006, 04:31 PM
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#21
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Member Group: Members Posts: 509 Joined: 2-July 05 From: Calgary, Alberta Member No.: 426 |
QUOTE (ljk4-1 @ Apr 7 2006, 09:22 AM) Has anyone checked to see if Neptune has any blue rings? Shall I presume that Jupiter does not? My first guess would be that Neptune was probably checked out right after the new Uranian rings were discovered, as soon as it was possible to do so at least. And I'm sure Mark Showalter has probably been busy poring over old Voyager 2 images as well, to see what might be revealed under the light of modern digital image processing. |
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