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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 March 16   
      
                        Millions of Stars in Omega Centauri   
         Image Credit & Copyright: Neil Corke, Heaven's Mirror Observatory   
      
      Explanation: Globular star cluster Omega Centauri, also known as NGC   
      5139, is 15,000 light-years away. The cluster is packed with about 10   
      million stars much older than the Sun within a volume about 150   
      light-years in diameter. It's the largest and brightest of 200 or so   
      known globular clusters that roam the halo of our Milky Way galaxy.   
      Though most star clusters consist of stars with the same age and   
      composition, the enigmatic Omega Cen exhibits the presence of different   
      stellar populations with a spread of ages and chemical abundances. In   
      fact, Omega Cen may be the remnant core of a small galaxy merging with   
      the Milky Way. Omega Centauri's red giant stars (with a yellowish hue)   
      are easy to pick out in this sharp, color telescopic view.   
      
                          Tomorrow's picture: serpentine   
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