Morning Frost Seen on Martian Surface

frost seen on Martian surface

A sign of fall approaching on Mars

The Surface Stereo Imager, or SSI, on NASA’s Phoenix Mars Lander has seen water frost on the ground around the spacecraft’s landing site.

Water frost appears in an image the SSI took on Aug. 14, 2008, at 6 a.m. local Mars time on Sol 79, the 79th Martian day after landing. The frost begins to disappear shortly after 6 a.m. as the sun rises on the landing site.

The sun was about 22 degrees above the horizon when SSI took the image. Light at that oblique angle enhanced the detail of the polygons, troughs and rocks in the surrounding terrain.

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~ by aspoeth on August 18, 2008.

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