On a ring origin of the equatorial ridge of Iapetus |
Unmanned Spaceflight.com > Outer Solar System > Saturn > Cassini Huygens > Cassini's ongoing mission and raw imagesOn a ring origin of the equatorial ridge of Iapetus |
| Guest_AlexBlackwell_* |
 Aug 29 2006, 06:18 PM
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Wing Ip just had an interesting Iapetus-related paper published in GRL.
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Sep 6 2006, 02:08 PM
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 Senior Member  Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
I did ask the other day for someone to re-post an appropriate image link for this discussion but nobody did, so I went browsing. I liked this one because it's easier to 'read' a landscape when down is at the bottom; also I found the chocolate brown quite appealing . .
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Sep 6 2006, 02:15 PM
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 Senior Member Group: Members Posts: 3652 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (ngunn @ Sep 6 2006, 03:08 PM)  I did ask the other day for someone to re-post an appropriate image link for this discussion but nobody did, so I went browsing. I liked this one because it's easier to 'read' a landscape when down is at the bottom; also I found the chocolate brown quite appealing . . I'll try to dig up the presentation later. If anything, I'll get the image off the PDS. In the meantime, here's what I think is a more likely natural color of Iapetus:
Yes, it's a dark image. Mainly due to bright ice being overexposed in the northern latitudes if I increase the brightness any more. The brightness difference is notable. I believe the south polar ice (not seen here) is even brighter compared to this view. -------------------- |
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AlexBlackwell On a ring origin of the equatorial ridge of Iapetus Aug 29 2006, 06:18 PM
volcanopele okay, now a ring around Iaptetus is an interesting... Aug 29 2006, 06:20 PM AlexBlackwell Here's an interesting passage from the conclud... Aug 29 2006, 06:25 PM Michael Capobianco Does the paper address why the equatorial ridge do... Aug 29 2006, 06:40 PM
David QUOTE (Michael Capobianco @ Aug 29 2006, 06... Aug 29 2006, 07:05 PM
Decepticon QUOTE (Michael Capobianco @ Aug 29 2006, 02... Aug 29 2006, 11:56 PM JRehling Roughly speaking, I guess the fact that the ridge ... Aug 30 2006, 01:07 AM jsheff Would this process also explain the albedo assymet... Aug 29 2006, 07:06 PM tasp QUOTE (jsheff @ Aug 29 2006, 02:06 PM) Wo... Sep 10 2006, 01:35 AM AlexBlackwell QUOTE (Michael Capobianco @ Aug 29 2006, 08... Aug 29 2006, 07:44 PM tasp An object skimming the surface of Iapetus will hav... Aug 30 2006, 05:11 AM AlexBlackwell There was a brief blurb about this paper yesterday... Aug 30 2006, 07:53 PM Rob Pinnegar I guess this idea probably originated with those i... Aug 30 2006, 09:41 PM tasp QUOTE (Rob Pinnegar @ Aug 30 2006, 04:41 ... Aug 30 2006, 11:29 PM dvandorn Does Iapetus' ridge have to have been created ... Aug 31 2006, 12:04 AM tasp Maintaining focus (or collimation) of the strand ... Aug 31 2006, 03:02 AM David I think I understand the idea to be one of a low-v... Aug 31 2006, 07:23 AM ngunn Under the scenario proposed I would expect volatil... Aug 31 2006, 10:00 AM ugordan QUOTE (ngunn @ Aug 31 2006, 11:00 AM) Cou... Aug 31 2006, 11:18 AM ngunn QUOTE (ugordan @ Aug 31 2006, 12:18 PM) M... Aug 31 2006, 11:50 AM ugordan The point I was trying to make is the greatest tem... Aug 31 2006, 12:08 PM ngunn QUOTE (ugordan @ Aug 31 2006, 01:08 PM) A... Aug 31 2006, 12:38 PM ngunn One other point - the 'catastrophic atmosphere... Aug 31 2006, 01:06 PM tasp Invoking an atmosphere above a certain very low de... Aug 31 2006, 01:27 PM ngunn QUOTE (tasp @ Aug 31 2006, 02:27 PM) Invo... Aug 31 2006, 02:01 PM The Messenger QUOTE (tasp @ Aug 31 2006, 07:27 AM) I al... Sep 3 2006, 11:22 PM ngunn QUOTE (The Messenger @ Sep 4 2006, 12:22 ... Sep 4 2006, 10:13 AM The Messenger QUOTE (ngunn @ Sep 4 2006, 04:13 AM) Why?... Sep 6 2006, 03:21 AM ngunn QUOTE (The Messenger @ Sep 6 2006, 04:21 ... Sep 6 2006, 08:15 AM JRehling A comment on followup missions: Whatever future mi... Sep 6 2006, 12:02 PM ugordan QUOTE (JRehling @ Sep 6 2006, 01:02 PM) A... Sep 6 2006, 12:29 PM mchan QUOTE (ugordan @ Sep 6 2006, 05:29 AM) Tr... Sep 6 2006, 11:15 PM ugordan QUOTE (mchan @ Sep 7 2006, 12:15 AM) I do... Sep 7 2006, 06:58 AM TritonAntares Hi,
let us anticipate the equatorial ridge was bui... Sep 6 2006, 08:51 AM ugordan The ridge is ancient which means the ring is also ... Sep 6 2006, 09:03 AM ngunn QUOTE (ugordan @ Sep 6 2006, 10:03 AM) Pe... Sep 6 2006, 12:41 PM ngunn QUOTE (TritonAntares @ Sep 6 2006, 09:51 ... Sep 6 2006, 09:05 AM tasp QUOTE (TritonAntares @ Sep 6 2006, 03:51 ... Sep 9 2006, 02:32 PM JRehling QUOTE (The Messenger @ Sep 3 2006, 04:22 ... Sep 5 2006, 04:44 PM tasp And this, consider the oblique impactor that may h... Aug 31 2006, 01:33 PM ngunn Note the following sentence already quoted by Alex... Aug 31 2006, 02:52 PM tasp I am having trouble seeing how the precipitating l... Aug 31 2006, 03:56 PM Rob Pinnegar You mention "attendant ridges". This was... Aug 31 2006, 05:20 PM ngunn On multiple ridges - perhaps the emplacement of th... Sep 1 2006, 11:26 AM tasp I admit a certain favoring of an oblique impact kn... Sep 1 2006, 01:45 PM ngunn This discussion has become really interesting. I... Sep 1 2006, 02:52 PM ngunn Just found John Rehling's rather nice diagram ... Sep 4 2006, 01:49 PM TritonAntares Hi,
I've just been back from a 1-week-vacation... Sep 5 2006, 10:27 AM djellison Links to that place are not a good idea. Can peop... Sep 6 2006, 02:13 PM ngunn QUOTE (djellison @ Sep 6 2006, 03:13 PM) ... Sep 6 2006, 02:31 PM Themisto QUOTE (ngunn @ Sep 6 2006, 04:31 PM) Sorr... Sep 6 2006, 03:06 PM djellison That's better
We used to worry about mention... Sep 6 2006, 03:10 PM ngunn OK let's see if this works..
http://www.aaw-d... Sep 6 2006, 03:45 PM tasp 3 intersecting ridges, all describing segments of ... Sep 6 2006, 06:47 PM ngunn QUOTE (tasp @ Sep 6 2006, 07:47 PM) The f... Sep 7 2006, 08:51 AM tasp Some of the criteria that seem to be needed for us... Sep 7 2006, 02:58 PM ngunn QUOTE (tasp @ Sep 7 2006, 03:58 PM) Some ... Sep 7 2006, 03:45 PM tasp We may find Iapetan like ridge structures on a per... Sep 7 2006, 03:03 PM TritonAntares Hi,
before we should keep on speculating whether t... Sep 7 2006, 03:50 PM ngunn QUOTE (TritonAntares @ Sep 7 2006, 04:50 ... Sep 8 2006, 10:44 AM ugordan I have absolutely no idea on which internal proces... Sep 8 2006, 11:05 AM ngunn QUOTE (ugordan @ Sep 8 2006, 12:05 PM) I ... Sep 8 2006, 12:04 PM ugordan QUOTE (ngunn @ Sep 8 2006, 01:04 PM) On g... Sep 8 2006, 12:25 PM ngunn QUOTE (ugordan @ Sep 8 2006, 01:25 PM) It... Sep 8 2006, 12:45 PM ugordan Yeah, but why would it flatten itself along the eq... Sep 8 2006, 12:50 PM Rob Pinnegar Two things today:
QUOTE (ugordan @ Sep 8 200... Sep 8 2006, 01:56 PM ynyralmaen QUOTE (ngunn @ Sep 8 2006, 12:44 PM) So, ... Sep 8 2006, 11:34 AM ngunn QUOTE (ynyralmaen @ Sep 8 2006, 12:34 PM)... Sep 8 2006, 12:12 PM tasp QUOTE (ngunn @ Sep 8 2006, 05:44 AM) So, ... Sep 8 2006, 01:33 PM Bill Harris This has been a fascinating discussion. Before Ca... Sep 8 2006, 12:56 PM ngunn Hello Bill - nice to know it's not just the 4 ... Sep 8 2006, 01:18 PM tasp QUOTE (ngunn @ Sep 8 2006, 08:18 AM) Hell... Sep 8 2006, 01:40 PM tasp Some where here at UMSF is a nice map of Iapetus (... Sep 8 2006, 02:27 PM tasp I will note that Iapetus is subject to the smalles... Sep 8 2006, 02:30 PM ugordan However, the surface gravity at Iapetus is also va... Sep 8 2006, 02:38 PM tasp I also point out that the New Solar System books... Sep 8 2006, 02:36 PM tasp Virtually all solar system objects are believed to... Sep 8 2006, 02:52 PM ngunn Is this the one? http://photojournal.jpl.nasa.gov/... Sep 8 2006, 02:54 PM tasp QUOTE (ngunn @ Sep 8 2006, 09:54 AM) Is t... Sep 8 2006, 02:59 PM ugordan Iapetus is undeniably oblate, but the question is ... Sep 8 2006, 03:04 PM tasp QUOTE (ugordan @ Sep 8 2006, 10:04 AM) Ia... Sep 9 2006, 05:31 AM hendric I still don't see how the two divergent ridges... Sep 8 2006, 05:54 PM TritonAntares QUOTE 37th DPS Meeting, 4-9 September 2005
Session... Sep 8 2006, 08:29 PM tasp QUOTE (TritonAntares @ Sep 8 2006, 03:29 ... Sep 9 2006, 05:28 AM ngunn QUOTE (TritonAntares @ Sep 8 2006, 09:29 ... Sep 9 2006, 08:59 AM tasp QUOTE (ngunn @ Sep 9 2006, 03:59 AM) . . ... Sep 9 2006, 01:56 PM ngunn QUOTE (tasp @ Sep 9 2006, 02:56 PM) I hav... Sep 9 2006, 09:56 PM tasp QUOTE (hendric @ Sep 8 2006, 12:54 PM) I ... Sep 9 2006, 05:10 AM tasp Also, check out the big elongated crater at 0 to 3... Sep 9 2006, 05:35 AM tasp Just noticed I did not address moonlets below sync... Sep 9 2006, 09:00 PM tasp I am thinking we aren't going to see an Iapeta... Sep 10 2006, 01:00 AM tasp Speaking of New Horizons, how far out can it produ... Sep 10 2006, 01:11 AM tasp Regarding perturbations of a possible Iapetan ring... Sep 10 2006, 05:08 PM Michael Capobianco Well, I'm still a bit skeptical as well. For o... Sep 10 2006, 05:18 PM tasp Of course, the most interesting bit of the ridge s... Sep 10 2006, 06:00 PM ngunn So much to reply to (no, it isn't driving me t... Sep 10 2006, 08:05 PM tasp QUOTE (ngunn @ Sep 10 2006, 03:05 PM) On ... Sep 11 2006, 02:42 AM |
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