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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 7   
      
                           The Double Cluster in Perseus   
                      Image Credit & Copyright: M+Ñrten Frosth   
      
      Explanation: This pretty starfield spans about three full moons (1.5   
      degrees) across the heroic northern constellation of Perseus. It holds   
      the famous pair of open star clusters, h and Chi Persei. Also cataloged   
      as NGC 869 (top) and NGC 884, both clusters are about 7,000 light-years   
      away and contain stars much younger and hotter than the Sun. Separated   
      by only a few hundred light-years, the clusters are both 13 million   
      years young based on the ages of their individual stars, evidence that   
      they were likely a product of the same star-forming region. Always a   
      rewarding sight in binoculars, the Double Cluster is even visible to   
      the unaided eye from dark locations.   
      
                         Tomorrow's picture: light-weekend   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC   
                                & Michigan Tech. U.   
      
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