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File:PIA10245-Martian landslide.jpg

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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.
Français : Traduction de la description originale de la NASA :

Une avalanche de débris photographiée en mouvement.

Cette image fait partie des milliers déjà prises de Mars par divers orbiteurs. Cependant, ces images montrent des paysages qui n'ont pas changé depuis des millions d'années. Certaines prises de vue ont mis en évidence des changement saisonniers, mais la prise sur le vif d'évènements aussi ponctuels est très rare. Il existe quelque autres images montrant des tourbillons de poussière ("dust devils"). L'observation de tels évènements permet sur Terre de mieux se représenter des phénomènes passés. Cet outil est rarement disponible pour les scientifiques étudiant Mars.
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
This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA10245.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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current11:56, 22 December 2008Thumbnail for version as of 11:56, 22 December 20084,048 × 4,456 (9.35 MB)Anrie (talk | contribs)== Opsomming == {{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

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