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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 November 19   
      A series of white parallel clouds are seen going off into the distance   
      in a background blue sky. In the foreground is a hill with two domes at   
        the top. Please see the explanation for more detailed information.   
      
                  Undulatus Clouds over Las Campanas Observatory   
          Image Credit & Copyright: Yuri Beletsky (Carnegie Las Campanas   
                       Observatory, TWAN); h/t: Alice Allen   
      
      Explanation: What's happening with these clouds? While it may seem that   
      these long and thin clouds are pointing toward the top of a hill, and   
      that maybe a world-famous observatory is located there, only part of   
      that is true. In terms of clouds, the formation is a chance   
      superposition of impressively periodic undulating air currents in   
      Earth's lower atmosphere. Undulatus, a type of Asperitas cloud, form at   
      the peaks where the air is cool enough to cause the condensation of   
      opaque water droplets. The wide-angle nature of the panorama creates   
      the illusion that the clouds converge over the hill. In terms of land,   
      there really is a world-famous observatory at the top of that peak: the   
      Carnegie Science's Las Campanas Observatory in the Atacama Desert of   
      Chile. The two telescope domes visible are the 6.5-meter Magellan   
      Telescopes. The featured coincidental vista was a surprise but was   
      captured by the phone of a quick-thinking photographer in late   
      September.   
      
        Your Sky Surprise: What picture did APOD feature on your birthday?   
                                    (post 1995)   
                         Tomorrow's picture: flight day 6   
        __________________________________________________________________   
      
          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.   
      
   --- BBBS/Li6 v4.10 Toy-7   
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