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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 December 30   
      
                                The Last Full Moon   
                    Image Credit & Copyright: Giacomo Venturin   
      
      Explanation: Known to some in the northern hemisphere as December's   
      Cold Moon or the Long Night Moon, the last full moon of 2023 is rising   
      in this surreal mountain and skyscape. The Daliesque scene was captured   
      in a single exposure with a camera and long telephoto lens near Monte   
      Grappa, Italy. The full moon is not melting, though. Its stretched and   
      distorted appearance near the horizon is caused as refraction along the   
      line of sight changes and creates shifting images or mirages of the   
      bright lunar disk. The changes in atmospheric refraction correspond to   
      atmospheric layers with sharply different temperatures and densities.   
      Other effects of atmospheric refraction produced by the long sight-line   
      to this full moon rising include the thin red rim seen faintly on the   
      distorted lower edge of the Moon and a thin green rim along the top.   
      
                           Tomorrow's picture: Illustris   
        __________________________________________________________________   
      
          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,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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