Then and Now, Changes over time |
Then and Now, Changes over time |
Apr 15 2006, 08:24 AM
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#1
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Member Group: Members Posts: 295 Joined: 2-March 04 From: Central California Member No.: 45 |
Of course we've seen similar side by side images showing the changes between the years. I never get tired of them...
Here's a couple...from 06/05/2000 M1600291 12.02m/pixel and 08/16/2005 S0901626 3.21m/pixel I rotated M1600291 so it would line up with S0901626. I didn't really scale them efficiently, M1600291 appears at 2x while S0901626 appears at 0.5x You can see that a couple of the 'seeps' (dust slides or whatever) are new. The other section I enlarge 2x from S0901626 I thought interesting as the 'dust' passed over two outcroppings but only made them slightly darker while the rest of the trail is quite a bit darker...I would think the darkness would be more uniform...maybe the dust didn't stick to the outcrop so much? -------------------- Eric P / MizarKey
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Apr 15 2006, 11:45 PM
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#2
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
The moving dust isn't dark. It's the material underneath the bright surface layer of dust that is dark. The streak is a place where the bright dust has been disturbed.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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