Seasonal Changes On Planet Mars
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Seasonal changes on the sand dunes of Planet Mars - captured by Mars Reconnaissance Orbiter.

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Because, like Earth, its axis is tilted away from the Sun, the planet Mars experiences all four seasons that the Earth does.  Since the Mars year is longer (1.88 years), the axial tilt is different, and Mars has a more eccentric orbit than Earth, the seasons are not all the same length:  Spring is 7 months, Summer 6 months, Fall 5.3 months and Winter just over 4 months.  
Mars Reconnaissance Orbiter was launched August 12, 2005, and attained Martian orbit on March 10, 2006.  In November 2006, after five months of aerobraking, it entered its final science orbit and began its primary science phase.  As it entered orbit it joined five other active spacecraft which were either in orbit or on the planet surface:  Mars Global Surveyor, Mars Express, Mars Odyssey, and two Mars Exploration Rovers; at the time a record for the most operational spacecraft in the immediate vicinity of Mars.   Scale of the zoomed-in image:  Less than 1 mile wide.  (Flixxy Editor's estimate)
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