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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.   
      
                                  2022 October 3   
      
                       Jupiter's Europa from Spacecraft Juno   
        Image Credit & License: NASA, JPL-Caltech, SwRI, MSSS; Processing:   
                                    Andrea Luck   
      
      Explanation: What mysteries might be solved by peering into this   
      crystal ball? In this case, the ball is actually a moon of Jupiter, the   
      crystals are ice, and the moon is not only dirty but cracked beyond   
      repair. Nevertheless, speculation is rampant that oceans exist under   
      Europa's fractured ice-plains that could support life. Europa, roughly   
      the size of Earth's Moon, is pictured here in an image taken a few days   
      ago when the Jupiter-orbiting robotic spacecraft Juno passed within 325   
      kilometers of its streaked and shifting surface. Underground oceans are   
      thought likely because Europa undergoes global flexing due to its   
      changing gravitational attraction with Jupiter during its slightly   
      elliptical orbit, and this flexing heats the interior. Studying Juno's   
      close-up images may further humanity's understanding not only of Europa   
      and the early Solar System but also of the possibility that life exists   
      elsewhere in the universe.   
      
                           Tomorrow's picture: big eagle   
        __________________________________________________________________   
      
          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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