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   TZUTC: -0800   
   CHRS: LATIN-1 2   
                           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 4   
      A thin crescent moon is shown with a bright red contrail going through   
          it, right to left. Please see the explanation for more detailed   
                                   information.   
      
                           Plane Crossing Crescent Moon   
                       Image Credit & Copyright: Juned Patel   
      
      Explanation: No, the Moon is not a bow, and no, it did not shoot out a   
      plane like an arrow. What is pictured is a chance superposition. The   
      plane's contrail would normally appear white, but the large volume of   
      air toward the rising Sun preferentially knocked away blue light, not   
      only making the sky blue, but giving the reflected trail a bright red   
      hue. Far in the distance, well behind the plane, the crescent Moon also   
      appears slightly reddened. Captured early last month from Bolton, UK,   
      the featured image was taken so soon after sunrise that the plane was   
      sunlit from below, as was its contrail. Within minutes, unfortunately,   
      the impromptu sky show ended. The plane moved out of sight. The Moon   
      kept rising but became harder to see through a brightening sky. And the   
      contrail gradually dispersed.   
      
                         Tomorrow's picture: powerful ray   
        __________________________________________________________________   
      
          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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