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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 22   
      
                                 NGC 7331 Close Up   
        Image Credit & License: ESA/Hubble & NASA/D. Milisavljevic (Purdue   
                                    University)   
      
      Explanation: Big, beautiful spiral galaxy NGC 7331 is often touted as   
      an analog to our own Milky Way. About 50 million light-years distant in   
      the northern constellation Pegasus, NGC 7331 was recognized early on as   
      a spiral nebula and is actually one of the brighter galaxies not   
      included in Charles Messier's famous 18th century catalog. Since the   
      galaxy's disk is inclined to our line-of-sight, long telescopic   
      exposures often result in an image that evokes a strong sense of depth.   
      This Hubble Space Telescope close-up spans some 40,000 light-years. The   
      galaxy's magnificent spiral arms feature dark obscuring dust lanes,   
      bright bluish clusters of massive young stars, and the telltale reddish   
      glow of active star forming regions. The bright yellowish central   
      regions harbor populations of older, cooler stars. Like the Milky Way,   
      a supermassive black hole lies at the core of spiral galaxy NGC 7331.   
      
                     Tomorrow's picture: ringed planet Neptune   
        __________________________________________________________________   
      
          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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