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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 October 1   
      A starfield is shown that has a multi-filament nebula flowing across it   
       horizontally. The most prominent colors are red and blue. Please see   
                  the explanation for more detailed information.   
      
                        NGC 6960: The Witch's Broom Nebula   
                      Image Credit & Copyright: Brian Meyers   
      
      Explanation: Ten thousand years ago, before the dawn of recorded human   
      history, a new light would suddenly have appeared in the night sky and   
      faded after a few weeks. Today we know this light was from a supernova,   
      or exploding star, and record the expanding debris cloud as the Veil   
      Nebula, a supernova remnant. This sharp telescopic view is centered on   
      a western segment of the Veil Nebula cataloged as NGC 6960 but less   
      formally known as the Witch's Broom Nebula. Blasted out in the   
      cataclysmic explosion, an interstellar shock wave plows through space   
      sweeping up and exciting interstellar material. Imaged with narrow band   
      filters, the glowing filaments are like long ripples in a sheet seen   
      almost edge on, remarkably well separated into atomic hydrogen (red)   
      and oxygen (blue-green) gas. The complete supernova remnant lies about   
      1400 light-years away towards the constellation Cygnus. This Witch's   
      Broom actually spans about 35 light-years. The bright star in the frame   
      is 52 Cygni, visible with the unaided eye from a dark location but   
      unrelated to the ancient supernova remnant.   
      
                       Tomorrow's picture: the shadowy realm   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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