05.15.2017 From 'Tribulation' to 'Perseverance' on Mars
03.29.2017 A Decade of Compiling the Sharpest Mars Map
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
01.25.2017 Blade-Like Martian Walls Outline Polygons
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
Color Image of Layers in Holden Crater, a Candidate MSL Landing SiteA portion of a trough in the Nili Fossae region of Mars is shown in enhanced color in this image from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. The image was taken on March 24, 2007, as part of a campaign to examine more than two dozen candidate landing sites for the NASA Mars Science Laboratory rover, which is scheduled for launch in 2009.
The Nili Fossae region has one of the largest exposures of clay minerals discovered by the mapping spectrometer (called OMEGA for its French name's acronym) on the European Space Agency's Mars Express orbiter. These minerals have also been mapped in greater detail by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on the Mars Reconnaissance Orbiter.
This image covers an area nearly one kilometer (six-tenths of a mile) wide, at 21.1 degrees north latitude, 74.2 degrees east longitude. North is up. It is a composite of exposures that HiRISE took in the infrared, red and blue portions of the spectrum. Color is enhanced beyond the standard enhancement in HiRISE color images, as this view is excerpted from a special video treatment of the full-frame image. The purple areas are basaltic in composition, including sand-sized material that bounces around in the wind to form dunes. Basalt in the most common type of volcanic rock on the Earth and other terrestrial planets. Orange areas are rich in clays. Clay minerals contain water in their mineral structure and may also preserve organic materials, so there is great interest in studying these deposits to understand past environments that could have supported life. The blue-green patches are outcops of unaltered rocks rich in the mineral pyroxene.
This is a portion of the full-frame color image catalogued as PSP_003086_2015 in the HiRISE collection. The image was taken at a local Mars time of 3:38 p.m. The scene is illuminated from the west with a solar incidence angle of 62 degrees, thus the sun was about 28 degrees above the horizon. The season on Mars was northern autumn.
Image Credit: NASA/JPL-Caltech/Univ. of Arizona