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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 15   
      
                               A Plutonian Landscape   
          Image Credit: NASA, Johns Hopkins Univ./APL, Southwest Research   
                                     Institute   
      
      Explanation: This shadowy landscape of majestic mountains and icy   
      plains stretches toward the horizon on a small, distant world. It was   
      captured from a range of about 18,000 kilometers when New Horizons   
      looked back toward Pluto, 15 minutes after the spacecraft's closest   
      approach on July 14, 2015. The dramatic, low-angle, near-twilight scene   
      follows rugged mountains formally known as Norgay Montes from   
      foreground left, and Hillary Montes along the horizon, giving way to   
      smooth Sputnik Planum at right. Layers of Pluto's tenuous atmosphere   
      are also revealed in the backlit view. With a strangely familiar   
      appearance, the frigid terrain likely includes ices of nitrogen and   
      carbon monoxide with water-ice mountains rising up to 3,500 meters   
      (11,000 feet). That's comparable in height to the majestic mountains of   
      planet Earth. The Plutonian landscape is 380 kilometers (230 miles)   
      across.   
      
                        Tomorrow's picture: pinwheel galaxy   
        __________________________________________________________________   
      
          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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