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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 10   
      
                         The Light, Dark, and Dusty Trifid   
        Image Credit & Copyright: Robert Edelmaier and Gabriele Gegenbauer   
      
      Explanation: Messier 20, popularly known as the Trifid Nebula, lies   
      about 5,000 light-years away toward the nebula rich constellation   
      Sagittarius. A star forming region in the plane of our galaxy, the   
      Trifid does illustrate three different types of astronomical nebulae;   
      red emission nebulae dominated by light from hydrogen atoms, blue   
      reflection nebulae produced by dust reflecting starlight, and dark   
      nebulae where dense dust clouds appear in silhouette. The reddish   
      emission region, roughly separated into three parts by obscuring dust   
      lanes, is what lends the Trifid its popular name. The cosmic cloud   
      complex is over 40 light-years across and would cover the area of a   
      full moon on planet Earth's sky. But the Trifid Nebula is too faint to   
      be seen by the unaided eye. Over 75 hours of image data captured under   
      dark night skies was used to create this stunning telescopic view.   
      
                         Watch: The Perseid Meteor Shower   
                      Tomorrow's picture: animation in space   
        __________________________________________________________________   
      
          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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