02.08.2017 Mars Reconnaissance Orbiter Observes Changes
01.26.2017 Mono Lake
01.25.2017 'Wing' Dike of Hardened Lava in New Mexico
01.25.2017 Blade-Like Martian Walls Outline Polygons
01.23.2017 Spirit And Opportunity By The Numbers
01.10.2017 Mars 2020 Rover - Artist's Concept
01.06.2017 Earth and Its Moon, as Seen From Mars
12.13.2016 Now and Long Ago at Gale Crater, Mars
12.13.2016 Where's Boron? Mars Rover Detects It
11.15.2016 Schiaparelli Impact Site on Mars, Stereo
11.03.2016 Schiaparelli Impact Site on Mars, in Color
10.17.2016 MAVEN Captures Rapid Cloud Formation
10.17.2016 Mars' Nightside Atmosphere
10.17.2016 Ultraviolet Image Near Mars' South Pole
10.17.2016 Ultraviolet Mars Reveals Cloud Formation
10.05.2016 Dust Haze Hiding the Martian Surface in 2001
10.04.2016 Test of Lander Vision System for Mars 2020
10.03.2016 A Sharpened Ultraviolet View of Mars
10.03.2016 Curiosity Self-Portrait at 'Murray Buttes'
10.03.2016 Butte 'M9a' in 'Murray Buttes' on Mars
09.19.2016 Ribbon Cutting
09.09.2016 Farewell to Murray Buttes (Image 5)
09.09.2016 Farewell to Murray Buttes (Image 4)
09.09.2016 Farewell to Murray Buttes (Image 3)
09.09.2016 Farewell to Murray Buttes (Image 2)
09.09.2016 Farewell to Murray Buttes (Image 1)
08.26.2016 Out-of-this-World Records
08.04.2016 Mars Rover Is New Social Media Game
08.04.2016 Mars Rover Social Media Game
08.02.2016 Artist Concept for RIMFAX
07.20.2016 Viking 40 Year Anniversary Artwork: Medal
07.18.2016 Mars 2020 Range Trigger
07.14.2016 NASA to Launch Mars Rover in 2020
Image from Mars Orbit Indicates Solar Panels on Phoneix Lander may have CollapsedThis set of images shows "before" and "after" images of NASA's Phoenix Mars Lander taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. Scientists are analyzing these images to better understand how the spacecraft may have endured its first Martian winter. The "before" image was taken on July 20, 2008 and the "after" image was taken on May 7, 2010. The new image of the Phoenix landing site is a close match to the season and illumination and viewing angles of some of the first HiRISE images acquired after the successful landing on May 25, 2008.
The large HiRISE image on the left was taken on July 20, 2008. The lander, heat shield, and backshell-plus-parachute are highlighted by inset boxes in that image. Smaller images on the right show side-by-side images of the lander, heat shield and backshell-plus-parachute in 2008 (before Martian winter) and 2010 (after Martian winter). Comparison of the two panels shows the lander, heat shield and backshell-plus-parachute now covered by dust. They lack the distinctive colors of the hardware or disturbances in pre-landing dust seen in 2008.
In the top right set of smaller "before Martian winter" and "after Martian winter" images of the lander, the 2008 lander image shows a very bright spot (from reflections) with relatively blue spots on either side corresponding to the clean circular solar panels. The shadows in that image consist of three overlapping dark circles, as shown by the schematic simulated image below the close-up lander images. In the 2010 image, where the illumination and viewing angles are within 1 degree of the 2008 image, scientists see a dark shadow that could be the lander body and eastern solar panel, but no shadow from the western solar panel. Because the reflection is no longer present on the dusty lander, the 2010 image should provide a better view of the shadow from the western array, but that shadow is absent.
Phoenix landed at 68 degrees north latitude, an area where the atmosphere and surface get so cold in winter that carbon dioxide forms a frost on the surface as much as several decimeters (one or more feet) thick. This frost, also known as dry ice, blankets the entire northern landscape each Martian winter, including any spacecraft that might be on the surface. The solar arrays on Phoenix were not designed to withstand significant loads of carbon dioxide frost, so scientists believe the western panel has collapsed.
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 prime contractor for the project and built the spacecraft.
Image Credit: NASA/JPL-Caltech/University of Arizona