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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 30   
      
                            Comet C/2017 K2 (PanSTARRS)   
              Image Credit & Copyright: Jose J. Chambo (Cometografia)   
      
      Explanation: Imaged on June 20 2022, comet C/2017 K2 (PanSTARRS) shares   
      this wide telescopic field of view with open star cluster IC 4665 and   
      bright star Beta Ophiuchi, near a starry edge of the Milky Way. On its   
      maiden voyage to the inner Solar System from the dim and distant Oort   
      cloud, this comet PanSTARRS was initially spotted over five years ago,   
      in May 2017. Then it was the most distant active inbound comet ever   
      found, discovered when it was some 2.4 billion kilometers from the Sun.   
      That put it between the orbital distances of Uranus and Saturn. Hubble   
      Space Telescope observations indicated the comet had a large nucleus   
      less than 18 kilometers in diameter. Now visible in small telescopes   
      C/2017 K2 will make its closest approach to planet Earth on July 14 and   
      closest approach to the Sun this December. Its extended coma and   
      developing tail are seen here at a distance of some 290 million   
      kilometers, a mere 16 light-minutes away.   
      
                      Tomorrow's picture: solar system trails   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                                & Michigan Tech. U.   
      
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