A sharp-eyed camera aboard NASA's Mars Reconnaissance Orbiter has sent back more stunning images of the Red Planet's surface showing colorful sand dunes, polar frost, and rocky features visible from space.

The High Resolution Imaging Science Experiment, or HiRISE camera, can spot surface features as small as 1 foot from an altitude of 186 miles. HiRISE is managed by researchers at the University of Arizona.

This picture shows surface textures in the southern polar residual cap of Mars. The cap was covered in seasonal carbon dioxide frost as this picture was taken. Photo credit: NASA/JPL/University of Arizona   A frost-covered dune field in Richardson crater is the subject of this picture. Photo credit: NASA/JPL/University of Arizona   Gullies radiate from the top of a mesa at Gorgonum Chaos, a region of chaotic terrain in the southern hemisphere. Photo credit: NASA/JPL/University of Arizona   This HiRISE view shows an outcrop of fractured rock on the floor of a large impact crater in the southern highlands. Photo credit: NASA/JPL/University of Arizona   The steep slope of this plateau is part of a long outflow channel system named Kasei Valles. The channel is approximately 0.8 miles deep, comparable to the topographic relief of the Grand Canyon. Photo credit: NASA/JPL/University of Arizona   An ancient impact site in the southern highlands of Mars is covered with boulders, indicating the crater is very old. Photo credit: NASA/JPL/University of Arizona