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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 January 14   
       A person stands on snow and looks up at a starry sky. In the sky is a   
      large green aurora that resembles a dragon. Please see the explanation   
                          for more detailed information.   
      
                            Dragon Aurora over Iceland   
                Image Credit & Copyright: Jingyi Zhang & Wang Zheng   
      
      Explanation: Have you ever seen a dragon in the sky? Although real   
      flying dragons don't exist, a huge dragon-shaped aurora developed in   
      the sky over Iceland in 2019. The aurora was caused by a hole in the   
      Sun's corona that expelled charged particles into a solar wind that   
      followed a changing interplanetary magnetic field to Earth's   
      magnetosphere. As some of those particles then struck Earth's   
      atmosphere, they excited atoms which subsequently emitted light:   
      aurora. This iconic display was so enthralling that the photographer's   
      mother ran out to see it and was captured in the foreground. Our active   
      Sun continues to show an unusually high number of prominences,   
      filaments, sunspots, and large active regions as solar maximum   
      approaches in 2025.   
      
                       Tomorrow's picture: reflecting stars   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Ryan Smallcomb Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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