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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.   
      
                                    2022 June 7   
      
                             NGC 6188: Dragons of Ara   
                     Image Credit & Copyright: Shaun Robertson   
      
      Explanation: Do dragons fight on the altar of the sky? Although it   
      might appear that way, these dragons are illusions made of thin gas and   
      dust. The emission nebula NGC 6188, home to the glowing clouds, is   
      found about 4,000 light years away near the edge of a large molecular   
      cloud unseen at visible wavelengths, in the southern constellation Ara   
      (the Altar). Massive, young stars of the embedded Ara OB1 association   
      were formed in that region only a few million years ago, sculpting the   
      dark shapes and powering the nebular glow with stellar winds and   
      intense ultraviolet radiation. The recent star formation itself was   
      likely triggered by winds and supernova explosions, from previous   
      generations of massive stars, that swept up and compressed the   
      molecular gas. Joining NGC 6188 on this cosmic canvas, visible toward   
      the lower right, is rare emission nebula NGC 6164, also created by one   
      of the region's massive O-type stars. Similar in appearance to many   
      planetary nebulae, NGC 6164's striking, symmetric gaseous shroud and   
      faint halo surround its bright central star near the bottom edge. This   
      impressively wide field of view spans over 2 degrees (four full Moons),   
      corresponding to over 150 light years at the estimated distance of NGC   
      6188.   
      
                         Tomorrow's picture: ocean stripes   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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