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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.   
      
                                    2025 May 17   
      
                    Ares 3 Landing Site: The Martian Revisited   
                 Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA   
      
      Explanation: This close-up from the Mars Reconnaissance Orbiter's   
      HiRISE camera shows weathered craters and windblown deposits in   
      southern Acidalia Planitia. A striking shade of blue in standard HiRISE   
      image colors, to the human eye the area would probably look grey or a   
      little reddish. But human eyes have not gazed across this terrain,   
      unless you count the eyes of NASA astronauts in the sci-fi novel, "The   
      Martian," by Andy Weir. The novel chronicles the adventures of Mark   
      Watney, an astronaut stranded at the fictional Mars mission Ares 3   
      landing site, corresponding to the coordinates of this cropped HiRISE   
      frame. For scale, Watney's 6-meter-diameter habitat at the site would   
      be about 1/10th the diameter of the large crater. Of course, the Ares 3   
      landing coordinates are only about 800 kilometers north of the (real   
      life) Carl Sagan Memorial Station, the 1997 Pathfinder landing site.   
      
                        Tomorrow's picture: fly over pluto   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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