Symmetrical dune ridges line up within the basin of a Martian crater in this HiRISE image from the Mars Reconnaissance Orbiter, taken on December 28, 2009. Rocks and boulders line the crater floor between them.
With the MRO’s computers now back online observation of the Martian surface can resume in full effect, providing us with amazingly detailed images like the one above once again.
Read the HiRISE release article here.
Image: NASA/JPL/University of Arizona