01.06.2017 Earth and Its Moon, as Seen From Mars
11.15.2016 Schiaparelli Impact Site on Mars, Stereo
11.03.2016 Schiaparelli Impact Site on Mars, in Color
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
10.05.2015 The Ares 3 Landing Site (Figure A)
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
05.11.2015 Icy Wonderland
05.04.2015 Diverse Orbits Around Mars
03.27.2015 South Pole Spiders
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
01.16.2015 Components of Beagle 2 Flight System on Mars
12.03.2014 An Enigmatic Feature in Athabasca Lava Flows
12.02.2014 NASA's Journey to Mars
11.07.2014 Mars Orbiter Sizes Up Passing Comet
10.19.2014 Siding Spring Mars Spacecraft
Fractures in Carbonate-Bearing Rocks at Mars' Huygens BasinThis image from orbit covers an area about 460 meters (about 1,500 feet) across, in which carbonate minerals have been identified from spectrometer observations. Fractures and possible layers are visible in the light-toned rock exposure containing the carbonates.
The location is inside an unnamed crater about 35 kilometers (22 miles) in diameter that is on the uplifted rim of Huygens crater, which is 467 kilometers (290 miles) in diameter. The excavations by the impacts that dug first Huygens and then the smaller crater have exposed material in this image that had been buried an estimated 5 kilometers (3 miles) deep. The carbonates may be from part of an extensive buried layer that could hold much of the carbon that was once in a thick Martian atmosphere of carbon dioxide, some researchers propose. Mars now has a thin atmosphere that is mostly carbon dioxide, but evidence that liquid water was once widespread on the surface suggests the atmosphere was much thicker billions of years ago.
The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter provided this image. Identification of iron or calcium carbonates at this site, and also of clay minerals indicating a formerly wet environment, comes from an observation by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on the same orbiter. In the presence of water and other conditions, carbon dioxide in the atmosphere can be captured into carbonate minerals.
The image is presented in false color, making differences in surface composition more visible than they would appear to the human eye. It combines information collected separately in red, blue-green, and near-infrared wavelengths. The image is from HiRISE observation ESP_012897_168, made on April 27, 2009, and centered at 11.6 degrees south latitude, 51.9 degrees east longitude. Other image products from this observation are available at http://hirise.lpl.arizona.edu/ESP_012897_1685 .
HiRISE is operated by the University of Arizona, Tucson. The instrument was built by Ball Aerospace & Technologies Corp., Boulder, Colo. The Johns Hopkins University Applied Physics Laboratory, Laurel, Md., led the effort to build the CRISM instrument and operates CRISM in coordination with an international team of researchers from universities, government and the private sector. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is NASA's industry partner for the mission and built the spacecraft.
Image Credit: NASA/JPL-Caltech/Univ. of Arizona