NASA Mars Reconnaissance Orbiter HiRISE images July 18, 2012

– Flows in Hellas Planitia http://hirise.lpl.arizona.edu/ESP_025925_1420

The floor of Hellas includes the lowest elevations on Mars and some of the strangest landscapes.

– Gully Monitoring on Crater Slopes in Terra Sirenum http://hirise.lpl.arizona.edu/ESP_027343_1410

The possible role of seasonal frost in gully formation along with the association of polygonal terrain with these and other gullies has garnered considerable interest.

– Frosted Gully Landforms http://hirise.lpl.arizona.edu/ESP_027647_1395

In the Martian winter, frost–mostly carbon dioxide–can build up in the gullies, especially on the cold slopes that face the pole.

– A Fading Impact Crater http://hirise.lpl.arizona.edu/ESP_027806_1700

This cluster of craters formed quite recently from a weak impactor that broke apart in Mars’ thin atmosphere before smashing into the surface.

All of the HiRISE images are archived here: http://hirise.lpl.arizona.edu/

Information about the Mars Reconnaissance Orbiter is online at http://www.nasa.gov/mro. The mission is managed by NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology, for the NASA Science Mission Directorate, Washington, D.C. Lockheed Martin Space Systems, of Denver, is the prime contractor and built the spacecraft. HiRISE is operated by the University of Arizona. Ball Aerospace and Technologies Corp., of Boulder, Colo., built the HiRISE instrument.