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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 September 9   
      A panoramic view of the surface of Mars. Several landforms are visible   
        including craters and volcanos. A small dark moon is superposed in   
         front of part of the surface. Please see the explanation for more   
                               detailed information.   
      
                         Mars: Moon, Craters, and Volcanos   
      Image Credit: ESA, DLR, FU Berlin, Mars Express; Processing & CC BY 2.0   
                       License: Andrea Luck; h/t: Phil Plait   
      
      Explanation: If you could fly over Mars, what might you see? The   
      featured image shows exactly this in the form of a Mars Express vista   
      captured over a particularly interesting region on Mars in July. The   
      picture's most famous feature is Olympus Mons, the largest volcano in   
      the Solar System, visible on the upper right. Another large Martian   
      volcano is visible on the right horizon: Pavonis Mons. Several circular   
      impact craters can be seen on the surface of the aptly named red   
      planet. Impressively, this image was timed to capture the dark and   
      doomed Martian moon Phobos, visible just left of center. The surface   
      feature on the lower left, known as Orcus Patera, is unusual for its   
      large size and oblong shape, and mysterious because the processes that   
      created it still remain unknown. ESA's robotic Mars Express spacecraft   
      was launched in 2003 and, among many notable science discoveries,   
      bolstered evidence that Mars was once home to large bodies of water.   
      
                      Tomorrow's picture: golden space horse   
        __________________________________________________________________   
      
          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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