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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.   
      
                                 2025 December 29   
         A dark starfield surrounds a colorful nebula filled with tangled   
       filaments. Please see the explanation for more detailed information.   
      
                                M1: The Crab Nebula   
                        Image Credit & Copyright: Alan Chen   
      
      Explanation: This is the mess that is left when a star explodes. The   
      Crab Nebula, the result of a supernova seen in 1054 AD, is filled with   
      mysterious filaments. The filaments are not only tremendously complex   
      but appear to have less mass than expelled in the original supernova   
      and a higher speed than expected from a free explosion. The featured   
      image was taken by an amateur astronomer in Leesburg, Florida, USA over   
      three nights last month. It was captured in three primary colors but   
      with extra detail provided by specific emission by hydrogen gas. The   
      Crab Nebula spans about 10 light years. In the Nebula's very center   
      lies a pulsar: a neutron star as massive as the Sun but with only the   
      size of a small town. The Crab Pulsar rotates about 30 times each   
      second.   
      
                    Explore the Universe: Random APOD Generator   
                       Tomorrow's picture: artificial comet   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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