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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 August 22   
      
                            The Dark Tower in Scorpius   
                       Image Credit & Copyright: Mike Selby   
      
      Explanation: In silhouette against a crowded star field along the tail   
      of the arachnological constellation Scorpius, this dusty cosmic cloud   
      evokes for some the image of an ominous dark tower. In fact, monstrous   
      clumps of dust and molecular gas collapsing to form stars may well lurk   
      within the dark nebula, a structure that spans almost 40 light-years   
      across this gorgeous telescopic portrait. A cometary globule, the   
      swept-back cloud is shaped by intense ultraviolet radiation from the OB   
      association of very hot stars in NGC 6231, off the upper right corner   
      of the scene. That energetic ultraviolet light also powers the   
      globule's bordering reddish glow of hydrogen gas. Hot stars embedded in   
      the dust can be seen as bluish reflection nebulae. This dark tower and   
      associated nebulae are about 5,000 light-years away.   
      
               Growing Gallery: Moon Eclipses Saturn in August 2024   
                         Tomorrow's picture: a dark pulsar   
        __________________________________________________________________   
      
          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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