NASA / JPL-CALTECH / UNIV. OF ARIZONA / SCIENCE PHOTO LIBRARY NASA / JPL-CALTECH / UNIV. OF ARIZONA / SCIENCE PHOTO LIBRARY
Dunes on Mars. Image of a sand dune field in the Southern Highlands of Mars, showing seasonal frost (white) on the peaks. Imaged by the HiRISE instrument on NASA's Mars Reconnaissance Orbiter (MRO).
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