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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.   
      
                                 2024 November 23   
      
                               Interplanetary Earth   
       Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA & NASA / JHU   
                  Applied Physics Lab / Carnegie Inst. Washington   
      
      Explanation: In an interplanetary first, on July 19, 2013 Earth was   
      photographed on the same day from two other worlds of the Solar System,   
      innermost planet Mercury and ringed gas giant Saturn. Pictured on the   
      left, Earth is the pale blue dot just below the rings of Saturn, as   
      captured by the robotic Cassini spacecraft then orbiting the outermost   
      gas giant. On that same day people across planet Earth snapped many of   
      their own pictures of Saturn. On the right, the Earth-Moon system is   
      seen against the dark background of space as captured by the sunward   
      MESSENGER spacecraft, then in Mercury orbit. MESSENGER took its image   
      as part of a search for small natural satellites of Mercury, moons that   
      would be expected to be quite dim. In the MESSENGER image, the brighter   
      Earth and Moon are both overexposed and shine brightly with reflected   
      sunlight. Destined not to return to their home world, both Cassini and   
      MESSENGER have since retired from their missions of Solar System   
      exploration.   
      
                     Tomorrow's picture: interstellar journey   
        __________________________________________________________________   
      
          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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