This map shows a color-coded interpretation of geomorphic units -- categories based on surface textures and contour -- in the region where NASA's Phoenix Mars Lander has studied an arctic Martian plain.

This map shows a color-coded interpretation of geomorphic units—categories based on surface textures and contours—in the region where NASA's Phoenix Mars Lander has studied an arctic Martian plain. It covers an area about 65 kilometers by 65 kilometers (40 miles by 40 miles).

The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

Photojournal Note: As planned, the Phoenix lander, which landed May 25, 2008 23:53 UTC, ended communications in November 2008, about six months after landing, when its solar panels ceased operating in the dark Martian winter.

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