The tilt of Mars' spin axis (obliquity) varies cyclically over hundreds of thousands of years, and affects the sunlight falling on the poles.
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Mars Obliquity Cycle Illustration

The tilt of Mars' spin axis (obliquity) varies cyclically over hundreds of thousands of years, and affects the sunlight falling on the poles. Because the landing site of NASA's Phoenix Mars Lander is so near the north pole, higher sun and warmer temperatures during high obliquity lead to warmer, more humid surface environments, and perhaps thicker, more liquid-like films of water in soil.

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.

Image details

ID#:
PIA11714

Date added:
2008-12-14

Target:
Mars

Mission:
Phoenix

Spacecraft:
Phoenix Mars Lander

Rating:



Views:
2,026

Full-Res TIFF:
PIA11714.tif (31.1 MB)

Full-Res JPG:
PIA11714.jpg (0.45 MB)

Image credit:
NASA/JPL/University of Arizona