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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 July 20   
      
                      Jupiter and Ring in Infrared from Webb   
      Image Credit: NASA, ESA, CSA, STScI; Processing & License: Judy Schmidt   
      
      Explanation: Why does Jupiter have rings? Jupiter's main ring was   
      discovered in 1979 by NASA's passing Voyager 1 spacecraft, but its   
      origin was then a mystery. Data from NASA's Galileo spacecraft that   
      orbited Jupiter from 1995 to 2003, however, confirmed the hypothesis   
      that this ring was created by meteoroid impacts on small nearby moons.   
      As a small meteoroid strikes tiny Metis, for example, it will bore into   
      the moon, vaporize, and explode dirt and dust off into a Jovian orbit.   
      The featured image of Jupiter in infrared light by the James Webb Space   
      Telescope shows not only Jupiter and its clouds, but this ring as well.   
      Also visible is Jupiter's Great Red Spot (GRS) -- in comparatively   
      light color on the right, Jupiter's large moon Europa -- in the center   
      of diffraction spikes on the left, and Europa's shadow -- next to the   
      GRS. Several features in the image are not yet well understood,   
      including the seemingly separated cloud layer on Jupiter's right limb.   
      
        Celestial Surprise: What picture did APOD feature on your birthday?   
                                    (post 1995)   
                          Tomorrow's picture: open space   
        __________________________________________________________________   
      
          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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