Titan's topography, strange.... |
Titan's topography, strange.... |
Apr 12 2009, 12:44 PM
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Recent article in Science by Zebker et al.:
Zebker et al. Science in press, "Size and Shape of Saturn's Moon Titan". doi: 10.1126/science.1168905 (published online April 2, 2009) Link to abstract (pay-for article): http://www.sciencemag.org/cgi/content/abstract/1168905 Article on spaceref discusses this paper: http://www.spaceref.com/news/viewpr.html?pid=27912 Figure 3 from the Science article is a global elevation map relative to barycenter. Key points of article:
"Xanadu seems to be systematically lower than other parts of the equatorial belt, and not uplifted like most mountainous areas on Earth." (quote from Fig. 3 caption in article) -Mike -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Oct 11 2009, 11:10 PM
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
That's great: I so much prefer a sequence of stills to an animation that can't be slowed down or paused. I'm slightly puzzled by the T8 + T41 SAR there. I'm sure I remember seeing a little bit more in the SAR before. Maybe T8 alone would be better. I think any speculation now will have a short life! I am expecting a 'eureka' moment from the VIMS paper, if not from that long awaited three colour image alone. However I think we have enough already to say that at least two things are going on: catastrophic floods with their depositional and erosional traces plus something else, maybe pre-existing topographic obstacles, the former perhaps less visible to radar than the latter.
Huygens saw pebbles on the ground. I want to know what they're made of - water ice or the bright organic stuff that Cassini sees in highland areas. I think that large parts of the spooky dude formation are likely made of these pebbles, so I'm hoping VIMS will tell us the answer. |
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