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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 30   
      The famous Eiffel Tower in Paris, France is pictured on the left lit up   
      in gold at night. A blue laser shines out from the top. Clouds dot the   
        background sky. The Moon is also visible through the clouds, but is   
       circled by colorful rings: a lunar corona. Please see the explanation   
                          for more detailed information.   
      
                             A Lunar Corona over Paris   
                     Image Credit & Copyright: Valter Binotto   
      
      Explanation: Why does a cloudy moon sometimes appear colorful? The   
      effect, called a lunar corona, is created by the quantum mechanical   
      diffraction of light around individual, similarly-sized water droplets   
      in an intervening but mostly-transparent cloud. Since light of   
      different colors has different wavelengths, each color diffracts   
      differently. Lunar coronae are one of the few quantum mechanical color   
      effects that can be easily seen with the unaided eye. Solar coronae are   
      also sometimes evident. The featured image was taken last month from   
      Paris, France. The blue beacon emanating from the Eiffel Tower did not   
      affect the colorful lunar corona.   
      
                      Portal Universe: Random APOD Generator   
                        Tomorrow's picture: nebulous realm   
        __________________________________________________________________   
      
          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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