Moon Images |
Moon Images |
Feb 17 2007, 09:28 PM
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I updated my site with a page with images of the moons of Uranus and Neptune. I will develop individual pages with more imagery, including color stuff eventually.
Here is the link. Also, here is a link to the Proteus page, the only indivudual page that is already up. By the way, at the bottom of the index page, I have a new shot of Neptune and Triton from WFPC 1 from before the repair mission. -------------------- |
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Nov 3 2007, 04:44 AM
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Yeah, I noticed that too, Dan. (I was also struck by the apparent low cratering rate, but it seems logical that the inner Solar System was/is much more prone to this; Neptune's orbit may sweep out a lot more volume of space, but there's also probably been a lot less debris out there since well before the LHB.) However, I do recall seeing things like the "brush strokes" in other enhanced imagery of other objects, so my money's on image processing artifacts.
-------------------- 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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Nov 3 2007, 01:01 PM
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Many of the "brush strokes" are cracks that radiate from the large impact craters. As for the unusual features in the lower portion of the high resolution image, I always interpreted them as artifacts until the same features showed up in the second closest image. I have heard the theory that Proteus is the reconstituted remains of an old Neptunian moon that was destroyed by Triton's arrival. That may have something to do with it.
One things that helps is that although the closest frame is a single, underexposed frame, the next closest set has four images, and the more distant shots are made using two images. This allows for much more effective noise reduction when compared to the lone Voyager image of Puck. It's dimensions are 440×416×404 km, compared to about 502 km for Enceladus, 480×468.4×465.8 for Miranda, and is a bit larger than Mimas (414.8×394.4×381.4). Ceres also falls in that range (487 km at the equator, 455 km at the poles). Nereid is only ~340 km in diameter, and Larissa comes in at 216×204×164. -------------------- |
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