Iapetus - Black on white or white on black? |
Iapetus - 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 20 2007, 04:26 PM
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#2
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
RE: edstrick and the chemist, posts 40 & 42--
One of the things that has amazed and puzzled me from the first day are the flow lobes visible on the downhill side of these scarps/crater walls. Tha attached is an adaption of "iapetus_snow_1" showing multiple flow lobes that look all the world like snowy avalanches. Not unusual in the Alps, but this is a small airless world with temperatures in the -100's. And you can find these flow lobes frequently. Dunno what it means, capt'n, but it's gotta be significant... -------------------- |
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Sep 20 2007, 04:51 PM
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#3
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Member Group: Members Posts: 809 Joined: 11-March 04 Member No.: 56 |
RE: edstrick and the chemist, posts 40 & 42-- One of the things that has amazed and puzzled me from the first day are the flow lobes visible on the downhill side of these scarps/crater walls. Tha attached is an adaption of "iapetus_snow_1" showing multiple flow lobes that look all the world like snowy avalanches. Not unusual in the Alps, but this is a small airless world with temperatures in the -100's. And you can find these flow lobes frequently. Dunno what it means, capt'n, but it's gotta be significant... There's another one, just as striking, above the one you outlined; it seems to curve down and cut off two other flows on the slopes that come down from the left, apparently having flowed over them. |
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Sep 24 2007, 04:35 PM
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#4
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Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra | Portugal Member No.: 228 |
Tilmann Denk's "vote" at spacEurope:
"Denk thinks so...he goes even further, he believes that “we are close to solving the 335 years old riddle of the brightness dichotomy.” He told spacEurope is reasons for this positive perspective, “in earlier years, I usually remarked in presentations that the only commonality of all explanation attempts is that none of these is widely accepted. Now, I think different.”Interesting will be to see “how the data of the ridge will be interpreted”, also the “good coverage of most parts of the trailing side give us now an insight into the "last unknown" hemisphere of Iapetus.” Black and white, white and black, yin and yang, yang and yin...lots of speculation about the processes envolved, about the true nature of Iapetus...does Tilmann Denk have a definitive opinion about this? He does, ”black is on top of white. I'm pretty certain on this, now even more thanbefore the flyby”, where he was already quite sure about his look over this particular enigma." -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!"
Edgar Alan Poe |
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