Martian sand dunes, satellite image

Martian sand dunes, satellite image

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This image is part of the feature Mars As Art


Caption: Martian sand dunes. Coloured satellite image of north polar sand dunes blown into crescent shapes by the wind. The surface is covered by carbon dioxide frost (light brown) except the darker areas where the carbon dioxide has sublimated (turned from solid directly to gas) and exposed the basaltic sand beneath. Image obtained by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter (MRO) on 23rd July 2008. The width of this image is roughly 1.3 kilometres across.

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Keywords: 2008, 21st century, aeolian geology, basalt, basaltic sand, carbon dioxide, crescent, dark, dunes, erosion, exposed, from space, frozen, geographical, geography, geological, geology, high resolution imaging, hirise, hirise camera, mars, mars reconnaissance orbiter, martian, mro, nasa, planetary science, planetary surface, polar, polar sand dunes, sand dune, sand dunes, satellite image, solar system, space mission, sublimated, sublimates, sublimation, surface, thaw, thawed, vaporisation, vaporise, vaporize, volcanic rock, volcanic rocks, wind blown, windblown

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