Posted by: maboulette | November 19, 2011

NASA SPACECRAFT SPIES SAND DUNES SHIFTING ON MARS

Mars Reconnaissance Orbiter over Mars (concept...

PASADENA, Calif.  — Sand is blowing on the surface of Mars – in some places – at least that is what NASA said Thursday when it released images that documented dozens of areas on the red plant where sand dunes had shifted several yards.  NASA scientists have suspected this for years but thought it was only limited to a few locations. 

These latest images were taken by Mars Reconnaissance Orbiter that has been photographing the surface of Mar since 2005.

Dust is continually being blown around on Mars, but sand grains are tougher to move. In a study published online in the journal Geology, scientists theorize that the planet has stronger winds than originally expected in order to move the sand.

Source The Associated Press


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