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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 October 26   
      
                             Cocoon Nebula Wide Field   
                      Image Credit & Copyright: Andy Ermolli   
      
      Explanation: When does a nebula look like a comet? In this crowded   
      starfield, covering over two degrees within the high flying   
      constellation of the Swan (Cygnus), the eye is drawn to the Cocoon   
      Nebula. A compact star forming region, the cosmic Cocoon punctuates a   
      nebula bright in emission and reflection on the left, with a long trail   
      of interstellar dust clouds to the right, making the entire complex   
      appear a bit like a comet. Cataloged as IC 5146, the central bright   
      head of the nebula spans about 10 light years, while the dark dusty   
      tail spans nearly 100 light years. Both are located about 2,500 light   
      years away. The bright star near the bright nebula's center, likely   
      only a few hundred thousand years old, supplies power to the nebular   
      glow as it helps clear out a cavity in the molecular cloud's star   
      forming dust and gas. The long dusty filaments of the tail, although   
      dark in this visible light image, are themselves hiding stars in the   
      process of formation, stars that can be seen at infrared wavelengths.   
      
                          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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