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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.   
      
                                  2023 October 11   
      A nearby spiral galaxy is shown in great details: NGC 1097. However the   
      galaxy is imaged twice, once with a supernova spot appearing on a lower   
        spiral arm, and once without. The two frames blink back and forth.   
             Please see the explanation for more detailed information.   
      
                      NGC 1097: Spiral Galaxy with Supernova   
         Image Data: Telescope Live (Chile); Image Processing & Copyright:   
                                  Bernard Miller   
      
      Explanation: What's happening in the lower arm of this spiral galaxy? A   
      supernova. Last month, supernova SN 2023rve was discovered with UAE's   
      Al-Khatim Observatory and later found to be consistent with the death   
      explosion of a massive star, possibly leaving behind a black hole.   
      Spiral galaxy NGC 1097 is a relatively close 45 million light years   
      away and visible with a small telescope toward the southern   
      constellation of the Furnace (Fornax). The galaxy is notable not only   
      for its picturesque spiral arms, but also for faint jets consistent   
      with ancient star streams left over from a galactic collision --   
      possibly with the small galaxy seen between its arms on the lower left.   
      The featured image highlights the new supernova by blinking between two   
      exposures taken several months apart. Finding supernovas in nearby   
      galaxies can be important in determining the scale and expansion rate   
      of our entire universe -- a topic currently of unexpected tension and   
      much debate.   
      
      APOD editor to speak: in Houghton, Michigan on Thursday, October 12 at   
                                       6 pm   
                        Tomorrow's picture: The Garnet Star   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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