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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.   
      
                                   2023 June 25   
        A large swirling cloud on Jupiter is shown with a bright green spot   
       near its top. The cloud is surrounded by other less descript parts of   
          Jupiter's upper atmosphere. Please see the explanation for more   
                               detailed information.   
      
                               Lightning on Jupiter   
       Image Credit: NASA/JPL-Caltech/SwRI/MSSS; Processing & License: Kevin   
                                      M. Gill   
      
      Explanation: Does lightning occur only on Earth? No. Spacecraft in our   
      Solar System have detected lightning on other planets, including Mars,   
      Jupiter and Saturn, and lightning is likely on Venus, Uranus, and   
      Neptune. Lightning is a sudden rush of electrically charged particles   
      from one location to another. On Earth, drafts of colliding ice and   
      water droplets usually create lightning-generating charge separation,   
      but what happens on Jupiter? Images and data from NASA's   
      Jupiter-orbiting Juno spacecraft bolster previous speculation that   
      Jovian lightning is also created in clouds containing water and ice. In   
      the featured Juno photograph, an optical flash was captured in a large   
      cloud vortex near Jupiter's north pole. During the next few months,   
      Juno will perform several close sweeps over Jupiter's night side,   
      likely allowing the robotic probe to capture more data and images of   
      Jovian lightning.   
      
                     Tomorrow's picture: mountains below venus   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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