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03.09.2017 Back-to-Back Martian Dust Storms
02.08.2017 Mars Reconnaissance Orbiter Observes Changes
01.25.2017 'Wing' Dike of Hardened Lava in New Mexico
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01.06.2017 Earth and Its Moon, as Seen From Mars
11.15.2016 Schiaparelli Impact Site on Mars, Stereo
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03.30.2016 Erisa Hines
03.30.2016 Buzz Aldrin
03.21.2016 For a Decade Orbiting Mars: One Recent View
03.09.2016 For a Decade Orbiting Mars: One Recent View
03.09.2016 Mars Reconnaissance Orbiter By the Numbers
03.01.2016 MRO sees Frosty Spring Slopes
02.12.2016 Women in Science
02.10.2016 Wind at Work
11.16.2015 Change Observed in Martian Sand Dune
10.05.2015 'The Martian' Story's Ares 4 Landing Site
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09.30.2015 Avalanche Ho!
06.29.2015 Mars Exploration Zone Layout Considerations
06.17.2015 Active High-Latitude Dune Gullies
06.03.2015 Crisp Crater in Sirenum Fossae
05.20.2015 Sedimentary Rock Layers on a Crater Floor
05.20.2015 Honey, I Shrunk the Mesas
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05.04.2015 Diverse Orbits Around Mars
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03.27.2015 A Smile a Day....
03.25.2015 Pitted Landforms in Southern Hellas Planitia
03.12.2015 Curiosity Heading Away from 'Pahrump Hills'
02.18.2015 Lava Flow Near the Base of Olympus Mons
02.09.2015 Yardangs in Arsinoes Chaos, Mars
02.04.2015 Curiosity Rover at 'Pahrump Hills'
01.22.2015 Frost on Crater Slope
Dunes and Inverted Crater in Arabia TerraThis view of an inverted crater in the Arabia Terra region of Mars is among the images taken by NASA's Mars Reconnaissance Orbiter in early 2010 as the spacecraft approached the 100-terabit milestone in total data returned.
The orbiter's High Resolution Imaging Science Experiment (HiRISE) camera recorded this image on Jan. 29, 2010, and the spacecraft surpassed 100 terabits about three weeks later. That is more than three times as much data as the combined total from all other NASA missions that have flown farther from Earth than the orbit of Earth's moon. The Mars Reconnaissance Orbiter reached Mars in 2006 and completed its primary science phase in 2008.
The inverted crater seen here spans about 250 meters (about 800 feet) in diameter. Sand in the dark dunes around the crater was probably derived from basalt, a black volcanic rock that is common on Mars. Most craters are depressions, but this one sticks up above the surrounding plains. Such "inverted topography" is found on Mars and Earth where erosion has stripped away surrounding topography. In this case, the crater was filled with sediment, and then subsequent erosion stripped away the terrain around the filled crater.
This image covers a swath of ground about 600 meters (about 2,000 feet) wide at about 3 degrees north latitude, 5 degrees east longitude. It is one product from HiRISE observation ESP_016459_1830, which was taken during Mars' northern-hemisphere spring. Other image products from this observation are available at http://hirise.lpl.arizona.edu/ESP_016459_1830.
The University of Arizona, Tucson, operates the HiRISE camera, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, manages the Mars Reconnaissance Orbiter for the NASA Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the spacecraft development and integration contractor for the project and built the spacecraft.
Image Credit: NASA/JPL-Caltech/University of Arizona