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Loading ...Archive for March 3rd, 2010
HiRISE Images: January, 2010
March 3rd, 2010 | 
Author: HiRISE images of the red planet, from NASA’s Mars Reconnaissance Orbiter.
Dunes and Inverted Craters in Arabia Terra
Acquired: January 29th, 2009
Credit: NASA/JPL/University of Arizona
This image shows dark sand dunes and inverted craters in the Arabia Terra region of Mars.
The sand is dark because it was probably derived from basalt, a black volcanic rock that is common on Mars. Unlike traditional craters that are depressions, those here stick up above the surrounding plains. Such “inverted topography” is found on Mars and Earth where erosion has stripped away surrounding topography.
In this case, the craters were filled with sediment. Subsequent erosion stripped away the terrain around the filled craters, leaving the inverted topography visible here.
Monitoring of Polar Avalanche Region
Acquired: January 17th, 2009
Credit: NASA/JPL/University of Arizona
This HiRISE image shows the scarp that demarcates the boundary between layered deposits covering the north polar region and the lower surrounding terrain, which includes sand dunes.
This image was taken in the northern hemisphere Martian spring, where it is still cold enough that white carbon dioxide frost covers most of the area.
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Rhea
Raw images of Rhea, the second largest of Saturn’s sixty-one known moons. These images are from a flyby of the moon done yesterday, only the second time Rhea has been seen up close. The first being back in 2005 from some 500 kilometers, or 300 miles.
Taken on March 02, 2010 and received on Earth March 03, 2010. The camera was pointing toward RHEA at approximately 38,532 kilometers away, and the image was taken using the CL1 and CL2 filters.
Taken on March 02, 2010 and received on Earth March 03, 2010. The camera was pointing toward RHEA at approximately 38,532 kilometers away, and the image was taken using the CL1 and CL2 filters.
Taken on March 02, 2010 and received on Earth March 03, 2010. The camera was pointing toward RHEA at approximately 14,354 kilometers away, and the image was taken using the CL1 and CL2 filters.