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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 18   
      
                          Pluto Flyover from New Horizons   
      Video Credit: NASA, JHUAPL, SwRI, P. Schenk & J. Blackwell (LPI); Music   
                      Open Sea Morning by Puddle of Infinity   
      
      Explanation: What if you could fly over Pluto -- what might you see?   
      The New Horizons spacecraft did just this in 2015 July as it shot past   
      the distant world at a speed of about 80,000 kilometers per hour.   
      Images from this spectacular passage have been color enhanced,   
      vertically scaled, and digitally combined into the featured two-minute   
      time-lapse video. As your journey begins, light dawns on mountains   
      thought to be composed of water ice but colored by frozen nitrogen.   
      Soon, to your right, you see a flat sea of mostly solid nitrogen that   
      has segmented into strange polygons that are thought to have bubbled up   
      from a comparatively warm interior. Craters and ice mountains are   
      common sights below. The video dims and ends over terrain dubbed bladed   
      because it shows 500-meter high ridges separated by kilometer-sized   
      gaps. The robotic New Horizons spacecraft has too much momentum to ever   
      return to Pluto and is now headed out of our Solar System.   
      
                          Tomorrow's picture: moon Charon   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
                     NASA Web Privacy, Accessibility, Notices;   
                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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