NASA / JPL-CALTECH / U.ARIZONA / SCIENCE PHOTO LIBRARY NASA / JPL-CALTECH / U.ARIZONA / SCIENCE PHOTO LIBRARY
Sand dunes on Mars. Satellite of the surface of Mars, showing dunes of sand-sized materials that have been trapped on the floor of a crater in Noachis Terra. Imaged by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter, on 28th December 2009.
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