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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 July 10   
      A busy star formation region is shown highlighted by red glowing clouds   
        and dark ominously-shaped dust. Please see the explanation for more   
                               detailed information.   
      
                        Stars, Dust and Nebula in NGC 6559   
               Image Credit & Copyright: Adam Block, Telescope Live   
      
      Explanation: When stars form, pandemonium reigns. A textbook case is   
      the star forming region NGC 6559. Visible in the featured image are red   
      glowing emission nebulas of hydrogen, blue reflection nebulas of dust,   
      dark absorption nebulas of dust, and the stars that formed from them.   
      The first massive stars formed from the dense gas will emit energetic   
      light and winds that erode, fragment, and sculpt their birthplace. And   
      then they explode. The resulting morass can be as beautiful as it is   
      complex. After tens of millions of years, the dust boils away, the gas   
      gets swept away, and all that is left is a bare open cluster of stars.   
      
                          Tomorrow's picture: sun spotted   
        __________________________________________________________________   
      
          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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