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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 January 15   
        A messy array of colorful filaments is shown in front of a field of   
         stars. Please see the explanation for more detailed information.   
      
                          M1: The Crab Nebula from Hubble   
             Image Credit: NASA, ESA, Hubble, J. Hester, A. Loll (ASU)   
      
      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, taken by the Hubble Space Telescope, is presented in three   
      colors chosen for scientific interest. 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.   
      
      Discovery + Outreach: Graduate student research position open for APOD   
                        Tomorrow's picture: Moon, enhanced   
        __________________________________________________________________   
      
          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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