MARS RECONNAISSANCE ORBITER HIRISE IMAGES
August 21, 2013
o Small Crater within Pollack Crater Containing Light-Toned Material
This observation shows a small crater in within the much larger Pollack Crater containing light-toned material.
o Lava Against an Impact Crater in Elysium Planitia
In places where we see smaller ridges in the lava, they have steep faces that retain less dust and look rocky.
o Looking for Changes in Dust Drifts West of Alba Mons
This image was intended to search for surface changes after three Mars years in a dust-covered region west of the Alba Mons volcano.
o Frosted Impact Crater in Late Northern Winter
Changing gullies have so far been documented only in the Southern Hemisphere, where a greater thickness of carbon dioxide frost forms in the winter.
All of the HiRISE images are archived here:
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.