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 14 2007, 04:00 PM
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#2
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
...of course, in the Family Guy parody of this commercial, Officer Reese shoots the other guy in order to keep the precious discovery for himself...
Interesting how uncertain we all are now. I was a solid black-on-white-exogenous bloc member until the flyby; now I've gone white-on-black-exogenous. The craterless white highlands may hint at some internal activity still, but damned if I can think of a mechanism. Iapetus isn't well-situated orbitally for tidal heating, and its density doesn't seem high enough to make a compelling argument for enriched radioisotopes. What's left? -------------------- 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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