Catalog Page for PIA04587

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PIA04587: Defrosting Gully Aprons

NASA's Mars Global Surveyor shows frost-covered gullies in a crater in the martian southern hemisphere. The dark spots are areas where the frost has begun to change or sublime away.

Target Name:	Mars
Is a satellite of:	Sol (our sun)
Mission:	Mars Global Surveyor (MGS)
Spacecraft:	Mars Global Surveyor Orbiter
Instrument:	Mars Orbiter Camera (MOC)
Product Size:	540 x 810 pixels (w x h)
Produced By:	Malin Space Science Systems
Full-Res TIFF:	PIA04587.tif (438.1 kB)
Full-Res JPEG:	PIA04587.jpg (71.13 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

MGS MOC Release No. MOC2-398, 21 June 2003

This is a late winter Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) picture of frost-covered gullies in a crater in the martian southern hemisphere. The dark spots are areas where the frost has begun to change or sublime away. The gullies are formed by a combination of mass movement (landsliding) and possibly fluid flow through the channels--whether the fluid was liquid water or some other material is unknown. Today, the surfaces are dry and subjected to the seasonal coming-and-going of carbon dioxide frost. The image is located near 71.0°S, 95.5°W. Sunlight illuminates the scene from the upper left.

Image Credit:

NASA/JPL/Malin Space Science Systems

Image Addition Date:

2003-06-23