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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 20   
      A large purple transparent dome appears to cover much of a starry sky.   
      A person stands in a field looking toward the unusual spectacle. Please   
                see the explanation for more detailed information.   
      
                                  Aurora Dome Sky   
                Image Credit & Copyright: Xuecheng Liu & Yuxuan Liu   
      
      Explanation: It seemed like night, but part of the sky glowed purple.   
      It was the now famous night of May 10, 2024, when people over much of   
      the world reported beautiful aurora-filled skies. The featured image   
      was captured this night during early morning hours from Arlington,   
      Wisconsin, USA. The panorama is a composite of several 6-second   
      exposures covering two thirds of the visible sky, with north in the   
      center, and processed to heighten the colors and remove electrical   
      wires. The photographer (in the foreground) reported that the aurora   
      appeared to flow from a point overhead but illuminated the sky only   
      toward the north. The aurora's energetic particles originated from CMEs   
      ejected from our Sun over sunspot AR 6443 a few days before. This large   
      active region rotated to the far side of the Sun last week, but may   
      well survive to rotate back toward the Earth next week.   
      
                         Tomorrow's picture: hungry cloud   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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