Oct 12, 2007

Seasons of planet Mars

The Astronomical spring cames to Earth's northern hemisphere in March with the equinox on March 20th. But on planet Mars, northern spring begins on January 22nd. This picture of Mars was taken by the long-lasting Mars Global Surveyor spacecraft. The sprawling dark region near the center of the picture is Syrtis Major, with the whitish Hellas impact basin just below, in the southern hemisphere. The four seasons on Earth each last about 90 earth days, while Mars' larger and more eccentric elliptical orbit results in seasons that are longer and vary more widely in length - from about 140 to 190 martian sols. Link


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