Dawn Cruise |
Dawn Cruise |
Sep 27 2007, 12:31 PM
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#1
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Member Group: Members Posts: 100 Joined: 11-October 04 From: Oxford, UK (Glasgow by birth) Member No.: 101 |
Pushing out of Earth orbit now...........
-------------------- "There are 10 types of people in the world - those who understand binary code, and those who don't."
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Feb 14 2008, 07:51 PM
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#2
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Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
The weathering being referred to here is the general darkening of an airless surface by the implantation of solar wind particles. Local areas of relatively high magnetic strength on the moon are lighter colored than their surroundings because they prevent this weathering.
But you make a good point. Vesta might have more gardening from impacts, since it is in the main belt. That could lighten up the surface, too. Which might make it even harder to guess about the cause. Edit - Wait, wait. Sorry. You were talking about micrometeorites. Yes, they do darken the surface. I really don't know by what proportion. However, if you look at a picture of Reiner Gamma on the moon, you can see what a difference a magnetic shield can make. |
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Mar 5 2008, 02:09 AM
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#3
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Member Group: Members Posts: 540 Joined: 25-October 05 From: California Member No.: 535 |
-------------------- 2011 JPL Tweetup photos: http://www.rich-parno.com/aa_jpltweetup.html
http://human-spaceflight.blogspot.com |
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