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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 June 11   
      Colorful nebula and stars fill the wide images. The yellow star Antares   
       is visible on the left and blue reflection nebula surround a central   
       nebula and the nebula on the right surrounding the Rho Ophiuchi star   
         system. Please see the explanation for more detailed information.   
      
                    Colorful Stars and Clouds near Rho Ophiuchi   
                      Image Credit & Copyright: Craig Stocks   
      
      Explanation: Why is the sky near Antares and Rho Ophiuchi so colorful,   
      yet dusty? The colors result from a mixture of objects and processes.   
      Fine dust -- illuminated by starlight -- produces blue reflection   
      nebulae. Gaseous clouds whose atoms are excited by ultraviolet   
      starlight produce reddish emission nebulae. Backlit dust clouds block   
      starlight and so appear dark. Antares, a red supergiant and one of the   
      brighter stars in the night sky, lights up the yellow-red clouds on the   
      upper right of the featured image. The Rho Ophiuchi star system lies at   
      the center of the blue reflection nebula on the left, while a different   
      reflection nebula, IC 4605, lies just below and right of the image   
      center. These star clouds are even more colorful than humans can see,   
      emitting light across the electromagnetic spectrum.   
      
         Open Science: Browse 3,400+ codes in the Astrophysics Source Code   
                                      Library   
                        Tomorrow's picture: unexpected sky   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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