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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 June 27   
      
                        The Gum Nebula over Snowy Mountains   
                        Image Credit & Copyright: Wang Jin   
      
      Explanation: The Gum Nebula is so large and close it is actually hard   
      to see. This interstellar expanse of glowing hydrogen gas frequently   
      evades notice because it spans 35 degrees -- over 70 full Moons --   
      while much of it is quite dim. This featured spectacular 90-degree wide   
      mosaic, however, was designed to be both wide and deep enough to bring   
      up the Gum -- visible in red on the right. The image was acquired late   
      last year with both the foreground -- including Haba Snow Mountain --   
      and the background -- including the Milky Way's central band --   
      captured by the same camera and from the same location in Shangri-La,   
      Yunnan, China. The Gum Nebula is so close that we are only about 450   
      light-years from the front edge, while about 1,500 light-years from the   
      back edge. Named for a cosmic cloud hunter, Australian astronomer Colin   
      Stanley Gum (1924-1960), the origin of this complex nebula is still   
      being debated. A leading theory for the origin of the Gum Nebula is   
      that it is the remnant of a million year-old supernova explosion, while   
      a competing theory holds that the Gum is a molecular cloud shaped over   
      eons by multiple supernovas and the outflowing winds of several massive   
      stars.   
      
                          Tomorrow's picture: moon planet   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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                                & Michigan Tech. U.   
      
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