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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 August 25   
       A light-colored spherical body is shown mostly illuminated against a   
      dark background. Many craters are visible. Unusual blue stripes meander   
           on the surface. Please see the explanation for more detailed   
                                   information.   
      
                     Fresh Tiger Stripes on Saturn's Enceladus   
              Image Credit: NASA, ESA, JPL, SSI, Cassini Imaging Team   
      
      Explanation: Do underground oceans vent through canyons on Saturn's   
      moon Enceladus? Long features dubbed tiger stripes are known to be   
      spewing ice from the moon's icy interior into space, creating a cloud   
      of fine ice particles over the moon's South Pole and creating Saturn's   
      mysterious E-ring. Evidence for this has come from the robot Cassini   
      spacecraft that orbited Saturn from 2004 to 2017. Pictured here, a high   
      resolution image of Enceladus is shown from a close flyby. The unusual   
      surface features dubbed tiger stripes are visible in false-color blue.   
      Why Enceladus is active remains a mystery, as the neighboring moon   
      Mimas, approximately the same size, appears quite dead. An analysis of   
      ejected ice grains has yielded evidence that complex organic molecules   
      exist inside Enceladus. These large carbon-rich molecules bolster --   
      but do not prove -- that oceans under Enceladus' surface could contain   
      life.   
      
                   Explore Your Universe: Random APOD Generator   
                           Tomorrow's picture: sky wows   
        __________________________________________________________________   
      
          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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