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Polar Polygons

Aug. 18, 2005
NASA's Mars Global Surveyor shows dark-outlined polygons on a frost-covered surface in the south polar region of Mars.

18 August 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows dark-outlined polygons on a frost-covered surface in the south polar region of Mars. In summer, this surface would not be bright and the polygons would not have dark outlines--these are a product of the presence of seasonal frost.

Location near: 77.2°S, 204.8°W
Image width: width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Spring

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