Thursday, November 17, 2011

Watching sand dunes move on Mars

The UA HiRISE camera has captured numerous images showing sand dunes actively moving across the surface of Mars. The images below are from a new paper in Geology showing one of many shifting dunes that were identified. [Below, NASA caption: A dune in the northern polar region of Mars shows significant changes between two images taken on June 25, 2008 and May 21, 2010 by NASA's Mars Reconnaissance Orbiter. Image credit: NASA/JPL-Caltech/Univ. of Ariz./JHUAPL]. The high-resolution photos show details of ripples moving.