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Unmanned Spaceflight.com > Outer Solar System > Saturn > Cassini Huygens > Cassini's ongoing mission and raw imagesIapetus - Black on white or white on black? |
 Sep 14 2007, 07:40 AM
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#1
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 Member  Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12  |
Seems to be a lot of dispute on this subject... I think it's ice from the interior, but what does everyone else think?
Edit: This world seems very complex so the question could perhaps be phrased as 'which of these options is most responsible for the Iapetan dichotomy?' |
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Sep 18 2007, 08:24 AM
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#2
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
What can I say.. just look at this d__n stuff... At this latitude, ALMOST none of it is on a horizontal surface, it's almost ALL on slopes, facing noonday sun. Not quite all, but the stuff in the lower left basin rim setment is the totally classic example. I can't avoid the conclusion, as I said above, that some process has caused it to creep against gravity, to accumulate on surfaces perpendicular to the sun's rays at mid-day.
Igor... it's alive..... IT'S ALIVE!!!!!!!! <master.... you didn't take your medicine this morning!> (data taken and sharpend from UGordon's big b&w mosaic)
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Sep 20 2007, 01:34 PM
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#3
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 Member Group: Members Posts: 524 Joined: 24-November 04 From: Heraklion, GR. Member No.: 112 |
QUOTE (edstrick @ Sep 18 2007, 11:24 AM)  What can I say.. just look at this d__n stuff... At this latitude, ALMOST none of it is on a horizontal surface, it's almost ALL on slopes, facing noonday sun. Not quite all, but the stuff in the lower left basin rim setment is the totally classic example. I can't avoid the conclusion, as I said above, that some process has caused it to creep against gravity, to accumulate on surfaces perpendicular to the sun's rays at mid-day. (data taken and sharpend from UGordon's big b&w mosaic) Ed, I think that the image you posted is from an area where we see white ice on top of black soil. So it is just the walls of the basin that are black. The original released image can be found here. I attached a rotated version that matches the orientation in your image.
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SFJCody Iapetus - Black on white or white on black? Sep 14 2007, 07:40 AM
ngunn I think the responses you offer are inadequate. Gl... Sep 14 2007, 08:03 AM ugordan Where's the option "Black on White - blac... Sep 14 2007, 08:04 AM akuo Is this a Michael Jackson song?
Oh Iapetus, I wou... Sep 14 2007, 08:15 AM volcanopele I would prefer a both option: white on black in so... Sep 14 2007, 08:54 AM
JRehling QUOTE (volcanopele @ Sep 14 2007, 01:54 A... Sep 14 2007, 04:15 PM Juramike (Objects collide)
Object one: "Heeeey, you ... Sep 14 2007, 03:41 PM nprev ...of course, in the Family Guy parody of this com... Sep 14 2007, 04:00 PM Michael Capobianco I have to choose white on black on white - black e... Sep 14 2007, 04:33 PM lyford The only thing that I can say is that after readin... Sep 14 2007, 05:00 PM MarcF It was not a good idea to go to vacation far from ... Sep 15 2007, 04:26 PM tasp I would pick transparent material everywhere, keye... Sep 15 2007, 04:59 PM David QUOTE (tasp @ Sep 15 2007, 04:59 PM) I wo... Sep 15 2007, 08:34 PM ugordan QUOTE (David @ Sep 15 2007, 09:34 PM) whe... Sep 15 2007, 09:38 PM David QUOTE (ugordan @ Sep 15 2007, 09:38 PM) C... Sep 16 2007, 03:09 AM tasp Here is another 'negative' print of Iapetu... Sep 16 2007, 04:00 AM edstrick I get an overwhelming impression that the white an... Sep 16 2007, 05:23 AM Bill Harris You're right, Ed, this is all very mysterious.... Sep 16 2007, 10:41 AM JRehling QUOTE (Bill Harris @ Sep 16 2007, 03:41 A... Sep 17 2007, 05:22 AM dvandorn I agree, Bill -- the distribution of dark material... Sep 16 2007, 02:37 PM David QUOTE (dvandorn @ Sep 16 2007, 02:37 PM) ... Sep 16 2007, 05:32 PM dvandorn QUOTE (David @ Sep 16 2007, 12:32 PM) Wha... Sep 17 2007, 04:48 PM nprev QUOTE (dvandorn @ Sep 17 2007, 09:48 AM) ... Sep 17 2007, 05:56 PM tasp I was wondering about those streamlined (not quite... Sep 16 2007, 05:38 PM volcanopele QUOTE (tasp @ Sep 16 2007, 10:38 AM) I wa... Sep 17 2007, 05:18 AM ilbasso Seeing that old picture of Stevie Wonder made me t... Sep 16 2007, 05:45 PM tasp I can't help but think in the initial flush of... Sep 17 2007, 04:10 AM David QUOTE (tasp @ Sep 17 2007, 04:10 AM) I ca... Sep 17 2007, 06:10 AM tasp Hyperion. Sep 17 2007, 01:53 PM David QUOTE (tasp @ Sep 17 2007, 01:53 PM) Hype... Sep 17 2007, 02:32 PM ngunn QUOTE (David @ Sep 17 2007, 03:32 PM) no ... Sep 17 2007, 04:00 PM nprev Like oDoug, I too noticed the apparent "dunin... Sep 17 2007, 04:27 PM dvandorn QUOTE (nprev @ Sep 17 2007, 11:27 AM) Lik... Sep 17 2007, 04:59 PM tasp Here is some more 'ponding' to contemplate... Sep 17 2007, 05:37 PM tasp And the comparison.
{I suppose it would be nice... Sep 17 2007, 05:39 PM tasp Crikey, there is something hinky going on tweenst ... Sep 17 2007, 05:43 PM tasp We note earth's moon to have an orbit about ea... Sep 17 2007, 06:08 PM nprev True, but Earth's Moon is thought to be an art... Sep 17 2007, 06:12 PM alan There was a paper a couple of years ago linking Ti... Sep 17 2007, 07:42 PM ugordan QUOTE (TheChemist @ Sep 20 2007, 03:34 PM... Sep 20 2007, 01:45 PM dvandorn OK -- I understand your conclusion, here. But I s... Sep 18 2007, 01:46 PM The Messenger QUOTE (dvandorn @ Sep 18 2007, 07:46 AM) ... Sep 19 2007, 05:20 AM ugordan QUOTE (dvandorn @ Sep 18 2007, 03:46 PM) ... Sep 20 2007, 02:04 PM TheChemist Ugordan,
I think that I see wide openings (holes) ... Sep 20 2007, 02:00 PM Bill Harris RE: edstrick and the chemist, posts 40 & 42--
... Sep 20 2007, 04:26 PM David QUOTE (Bill Harris @ Sep 20 2007, 04:26 P... Sep 20 2007, 04:51 PM ustrax Tilmann Denk's "vote" at spacEurope:... Sep 24 2007, 04:35 PM dvandorn After seeing some of the contrast-enhanced images ... Sep 24 2007, 04:59 PM JRehling QUOTE (dvandorn @ Sep 24 2007, 09:59 AM) ... Sep 24 2007, 08:03 PM David QUOTE (JRehling @ Sep 24 2007, 08:03 PM) ... Sep 24 2007, 09:24 PM Bill Harris My first, and continuing, impression of the dicho... Sep 24 2007, 10:04 PM David QUOTE (Bill Harris @ Sep 24 2007, 10:04 P... Sep 25 2007, 02:48 AM |
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