File:PIA10245-Martian landslide.png

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DescriptionPIA10245-Martian landslide.png	English: Descriptions courtesy of NASA: The image shows a Martian avalanche, or debris fall, in action. Cameras orbiting Mars have taken thousands of images that have enabled scientists to put together pieces of Mars' geologic history. However, most of them reveal landscapes that haven't changed much in millions of years. Some images taken at different times of year do show seasonal changes from one image to the next, however, it is extremely rare to catch such a dramatic event in action. (Another, unrelated, active process that has been captured by Mars cameras are dust devils.) Observing currently active processes is often a useful tool in unlocking puzzles of the past for scientists studying the Earth. Working from primarily still images, it is harder for scientists studying Mars to rely on this tool. The HiRISE image of avalanching debris is a very rare opportunity to directly do so.
Date	February 19, 2008,
Source	PIA10245: Caught in Action: Avalanches on North Polar Scarps
Author	NASA/JPL-Caltech/University of Arizona
Permission (Reusing this file)	As per (http://www.jpl.nasa.gov/imagepolicy.cfm): Unless otherwise noted, images and video on JPL public web sites (public sites ending with a jpl.nasa.gov address) may be used for any purpose without prior permission

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	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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current	11:26, 22 December 2008		4,048 × 4,456 (18.9 MB)	Anrie (talk \| contribs)	{{Information \|Description={{en\|1=Descriptions courtesy of NASA: The image shows a Martian avalanche, or debris fall, in action. Cameras orbiting Mars have taken thousands of images that have enabled scientists to put together pieces of Mars' geologic h

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