PIA08657: Dark Spots and Fans
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  2001 Mars Odyssey
 Spacecraft:  2001 Mars Odyssey
 Instrument:  THEMIS
 Product Size:  523 x 881 pixels (w x h)
 Produced By:  Arizona State University
 Full-Res TIFF:  PIA08657.tif (461.5 kB)
 Full-Res JPEG:  PIA08657.jpg (101 kB)

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Original Caption Released with Image:

As winter turns to spring at the south polar ice cap of Mars, the rising sun reveals dark spots and fans emerging from the cold polar night. Using visual images (left) and temperature data (right) from the Thermal Emission Imaging system on NASA's Mars Odyssey orbiter, scientists have built a new model for the origin of the dark markings. Scientists propose the markings come from dark sand and dust strewn by high-speed jets of carbon-dioxide gas. These erupt from under a layer of carbon-dioxide ice that forms each Martian winter.

Image Credit:
NASA/JPL/Arizona State University

Image Addition Date: