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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 September 26   
      A starfield surrounds a large nebula that is mostly brown and blue and   
       has an appearance reminiscent of the head of a horse. This nebula is   
                                not the more famous   
      
                   IC 4592: The Blue Horsehead Reflection Nebula   
                 Image Credit & Copyright: Antoine & Dalia Grelin   
      
      Explanation: Do you see the horse's head? What you are seeing is not   
      the famous Horsehead nebula toward Orion, but rather a fainter nebula   
      that only takes on a familiar form with deeper imaging. The main part   
      of the here-imaged molecular cloud complex is reflection nebula IC   
      4592. Reflection nebulas are made up of very fine dust that normally   
      appears dark but can look quite blue when reflecting the visible light   
      of energetic nearby stars. In this case, the source of much of the   
      reflected light is a star at the eye of the horse. That star is part of   
      Nu Scorpii, one of the brighter star systems toward the constellation   
      of the Scorpion (Scorpius). A second reflection nebula dubbed IC 4601   
      is visible surrounding two stars above and to the right of the image   
      center.   
      
                          Tomorrow's picture: open space   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                                & Michigan Tech. U.   
      
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