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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 September 2   
      
                             M51: The Whirlpool Galaxy   
                      Image Credit & Copyright: Fabian Neyer   
      
      Explanation: Find the Big Dipper and follow the handle away from the   
      dipper's bowl until you get to the last bright star. Then, just slide   
      your telescope a little south and west and you'll come upon this   
      stunning pair of interacting galaxies, the 51st entry in Charles   
      Messier's famous catalog. Perhaps the original spiral nebula, the large   
      galaxy with well defined spiral structure is also cataloged as NGC   
      5194. Its spiral arms and dust lanes clearly sweep in front of its   
      companion galaxy (left), NGC 5195. The pair are about 31 million   
      light-years distant and officially lie within the angular boundaries of   
      the small constellation Canes Venatici. In direct telescopic views, M51   
      looks faint and fuzzy to the eye. But this remarkably deep image shows   
      off details of the interacting galaxy's striking colors and galactic   
      tidal debris. The image includes nearly 90 hours of narrowband data   
      that also reveals a vast glowing cloud of reddish ionized hydrogen gas   
      discovered in the M51 system.   
      
                       Tomorrow's picture: 29 seconds later   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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