HiRISE Spots Sand Dunes Near Nili Patera on Mars
In this image many sand dunes are visible. They have an elongated crescent form and are called “barchan dunes.” They are formed by the continuous…
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New Horizons Reveals a ‘Super Grand Canyon’ on Charon
Images from NASA’s New Horizons Spacecraft reveal an unusual canyon system that’s far longer and deeper than the Grand Canyon. The inset above magnifies a…