Dione |
Dione |
Nov 26 2004, 12:27 AM
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#1
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
Beautiful image of Dione
If Dione didn't have those white streaks it would look a lot like Iapetus |
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Dec 18 2004, 10:49 PM
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#2
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Senior Member Group: Members Posts: 2228 Joined: 1-December 04 From: Marble Falls, Texas, USA Member No.: 116 |
QUOTE (BruceMoomaw @ Dec 18 2004, 07:12 AM) ...in a situation like that the outer layer of ice is then the first to chill below its point of maximum expansion and so start shrinking again, thus getting stretched over the still-warmer and thus larger underlying ice to form extensional cracks, which don't close completely even after the underlying layers of ice also chill down to the point that they start contracting again as well. The particular patterns of resulting stress cracks might have something to do with the distribution of Saturnian tidal forces, or simply random factors. That sounds like a pretty convincing hypothesis to me, but wouldn't one expect that to occur on most of the large ice-moons that don't have liquid mantles? -------------------- ...Tom
I'm not a Space Fan, I'm a Space Exploration Enthusiast. |
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