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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 July 3   
        Planet Venus is pictured in ultraviolet light. The spherical planet   
         appears circular in tan colors with hints of blue. Complex cloud   
        patterns are evident. Please see the explanation for more detailed   
                                   information.   
      
                        Venus in Ultraviolet from Akatsuki   
        Image Credit & Copyright: JAXA, Planet-C Project Team; h/t: Mehmet   
                                   Hakan +ûzsara+º   
      
      Explanation: Why is Venus so different from Earth? To help find out,   
      Japan launched the robotic Akatsuki spacecraft which entered orbit   
      around Venus late in 2015 after an unplanned five-year adventure around   
      the inner Solar System. Even though Akatsuki was past its original   
      planned lifetime, the spacecraft and instruments were operating so well   
      that much of its original mission was reinstated. Also known as the   
      Venus Climate Orbiter, Akatsuki's instruments investigated unknowns   
      about Earth's sister planet, including whether volcanoes are still   
      active, whether lightning occurs in the dense atmosphere, and why wind   
      speeds greatly exceed the planet's rotation speed. In the featured   
      image taken by Akatsuki's UVI camera, the day-side of Venus is seen   
      shown with planet-scale V-shaped cloud pattern. The image displays   
      three ultraviolet colors and indicates a dip in the relative abundance   
      of sulfur dioxide shown in faint blue. Analyses of Akatsuki images and   
      data has shown, among other discoveries, that Venus has equatorial jet   
      similar to Earth's jet stream.   
      
                      Tomorrow's picture: sudden sky surprise   
        __________________________________________________________________   
      
          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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