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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 July 30   
         Four images of the Sun's edge are shown. In each a loop of bright   
           material is captured above the Sun's surface. Please see the   
                    explanation for more detailed information.   
      
                             Coronal Loops on the Sun   
                      Image Credit & Copyright: Andrea Vanoni   
      
      Explanation: Our Sun frequently erupts in loops. Hot solar plasma jumps   
      off the Sun's surface into prominences, with the most common type of   
      prominence being a simple loop. The loop shape originates from the   
      Sun's magnetic field, which is traced by spiraling electrons and   
      protons. Many loops into the Sun's lower corona are large enough to   
      envelop the Earth and are stable enough to last days. They commonly   
      occur near active regions that also include dark sunspots. The featured   
      panel shows four loops, each of which was captured near the Sun's edge   
      during 2024 and 2025. The images were taken by a personal telescope in   
      Mantova, Italy and in a very specific color of light emitted primarily   
      by hydrogen. Some solar prominences suddenly break open and eject   
      particles into the Solar System, setting up a space weather sequence   
      that can affect the skies and wires of Earth.   
      
                   Jigsaw Universe: Astronomy Puzzle of the Day   
                          Tomorrow's picture: open space   
        __________________________________________________________________   
      
          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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