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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.   
      
                                 2025 December 14   
      
                        Juno Flyby of Ganymede and Jupiter   
                   Video Credit: NASA, JPL-Caltech, SWRI, MSSS;   
         Animation: Koji Kuramura, Gerald Eichst+ñdt, Mike Stetson; Music:   
                                     Vangelis   
      
      Explanation: What would it be like to fly over the largest moon in the   
      Solar System? In 2021, the robotic Juno spacecraft flew past Jupiter's   
      huge moon Ganymede and took images that have been digitally constructed   
      into a detailed flyby. As the featured video begins, Juno swoops over   
      the two-toned surface of the 2,000-km wide moon, revealing an icy alien   
      landscape filled with grooves and craters. The grooves are likely   
      caused by shifting surface plates, while the craters are caused by   
      violent impacts. Continuing on in its orbit, Juno then performed its   
      34th close pass over Jupiter's clouds. The digitally-constructed video   
      shows numerous swirling clouds in the north, colorful planet-circling   
      zones and bands across the middle -- featuring several white-oval   
      clouds from the String of Pearls, and finally more swirling clouds in   
      the south.   
      
                       Tomorrow's picture: andromeda sprite   
        __________________________________________________________________   
      
          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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