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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 May 14   
      
                                  The 37 Cluster   
                     Image Credit & Copyright: Sergio Eguivar   
      
      Explanation: For the mostly harmless denizens of planet Earth, the   
      brighter stars of open cluster NGC 2169 seem to form a cosmic 37. Did   
      you expect 42? From our perspective, the improbable numerical asterism   
      appears solely by chance. It lies at an estimated distance of 3,300   
      light-years toward the constellation Orion. As far as galactic or open   
      star clusters go, NGC 2169 is a small one, spanning about 7   
      light-years. Formed at the same time from the same cloud of dust and   
      gas, the stars of NGC 2169 are only about 11 million years old. Such   
      clusters are expected to disperse over time as they encounter other   
      stars, interstellar clouds, and experience gravitational tides while   
      hitchhiking through the galaxy. Over four billion years ago, our own   
      Sun was likely formed in a similar open cluster of stars.   
      
                Gallery: Earth Aurora from Solar Active Region 3664   
                       Tomorrow's picture: green space arch   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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