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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.   
      
                                 2024 November 25   
      The top half glows red, while the bottom half is filled with dark dust.   
       Protruding into the red is a dark dust lane that resembles a horse's   
          head. Please see the explanation for more detailed information.   
      
                               The Horsehead Nebula   
                  Image Credit & Copyright: Alex Lin (Chilescope)   
      
      Explanation: One of the most identifiable nebulas in the sky, the   
      Horsehead Nebula in Orion, is part of a large, dark, molecular cloud.   
      Also known as Barnard 33, the unusual shape was first discovered on a   
      photographic plate in the late 1800s. The red glow originates from   
      hydrogen gas predominantly behind the nebula, ionized by the nearby   
      bright star Sigma Orionis. The darkness of the Horsehead is caused   
      mostly by thick dust, although the lower part of the Horsehead's neck   
      casts a shadow to the left. Streams of gas leaving the nebula are   
      funneled by a strong magnetic field. Bright spots in the Horsehead   
      Nebula's base are young stars just in the process of forming. Light   
      takes about 1,500 years to reach us from the Horsehead Nebula. The   
      featured image was taken from the Chilescope Observatory in the   
      mountains of Chile.   
      
                      Tomorrow's picture: meteor races comet   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                                & Michigan Tech. U.   
      
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