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                           Astronomy Picture of the Day   
      
       Discover the cosmos! Each day a different image or photograph of our   
         fascinating universe is featured, along with a brief explanation   
                       written by a professional astronomer.   
      
                                   2022 April 15   
      
                           The Gator-back Rocks of Mars   
                       Image Credit: NASA, JPL-Caltech, MSSS   
      
      Explanation: Wind-sharpened rocks known as ventifacts, cover this broad   
      sloping plain in the foot hills of Mount Sharp, Gale crater, Mars.   
      Dubbed gator-back rocks their rugged, scaly appearance is captured in   
      these digitally stitched Mastcam frames from the Curiosity rover on   
      mission sol 3,415 (March 15, 2022). Driving over gator-back rocks   
      before has resulted in damage to the rover's wheels, so Curiosity team   
      members decided to turn around and take another path to continue the   
      rover's climb. Curiosity has been on an ascent of Gale crater's central   
      5.5 kilometer high mountain since 2014. As it climbs, it's been able to   
      study layers shaped by water on Mars billions of years ago.   
      
                      Tomorrow's picture: the pines of Orion   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC   
                                & Michigan Tech. U.   
      
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