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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 21   
      
                         Galactic Cirrus: Mandel Wilson 9   
                Image Credit & Copyright: Gabriel Rodrigues Santos   
      
      Explanation: The combined light of stars along the Milky Way are   
      reflected by these cosmic dust clouds that soar 300 light-years or so   
      above the plane of our galaxy. Known to some as integrated flux nebulae   
      and commonly found at high galactic latitudes, the dusty galactic   
      cirrus clouds are faint. But they can be traced over large regions of   
      the sky toward the North and South Galactic poles. Along with the   
      reflection of starlight, studies indicate the dust clouds produce a   
      faint reddish luminescence as interstellar dust grains convert   
      invisible ultraviolet radiation to visible red light. Also capturing   
      nearby Milky Way stars and distant background galaxies, this remarkably   
      deep, wide-field image explores a complex of faint galactic cirrus   
      known as Mandel Wilson 9. It spans over three degrees across planet   
      Earth's skies toward the far southern constellation Apus.   
      
                         Tomorrow's picture: light-weekend   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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                         A service of: ASD at NASA / GSFC   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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