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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 August 11   
      
                         Closest Ever Images Near the Sun   
        Video Credit: NASA, JHUAPL, Naval Research Lab, Parker Solar Probe   
      
      Explanation: Everybody sees the Sun. Nobody's been there. Starting in   
      2018, though, NASA launched the robotic Parker Solar Probe (PSP) to   
      investigate regions near to the Sun for the first time. The featured   
      time-lapse video shows the view looking sideways from behind PSP's Sun   
      shield in December during the closest approach of any human-made   
      spacecraft to the Sun, looping down to only about five solar diameters   
      above the Sun's hot surface. The PSP's Wide Field Imager for Solar   
      Probe (WISPR) cameras took these images over seven hours, but they are   
      digitally compressed here into about 5 seconds. The solar corona,   
      including colliding coronal mass ejections (CMEs), is visible here in   
      unprecedented detail, with stars passing far in the background. The Sun   
      is not only Earth's dominant energy source, but its variable solar wind   
      also compresses Earth's atmosphere, triggers auroras, affects power   
      grids, and can even damage orbiting communication satellites.   
      
                           Tomorrow's picture: sky flow   
        __________________________________________________________________   
      
          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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