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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 February 15   
      
                                  Terminator Moon   
        Image Credit: NASA, Lunar Reconnaissance Orbiter, SVS; Processing &   
                            Copyright: Jai & Neil Shet   
      
      Explanation: What's different about this Moon? It's the terminators. In   
      the featured image, you can't directly see any terminator -- the line   
      that divides the light of day from the dark of night. That's because   
      the image is a digital composite of 29 near-terminator lunar strips.   
      Terminator regions show the longest and most prominent shadows --   
      shadows which, by their contrast and length, allow a flat photograph to   
      appear three-dimensional. The original images and data were taken near   
      the Moon by NASA's Lunar Reconnaissance Orbiter. Many of the Moon's   
      craters stand out because of the shadows they all cast to the right.   
      The image shows in graphic detail that the darker regions known as   
      maria are not just darker than the rest of the Moon -- they are   
      flatter.   
      
             Dial-A-Moon: Find the phase of the Moon on your birthday.   
                       Tomorrow's picture: eroding sun tower   
        __________________________________________________________________   
      
          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   
                                & Michigan Tech. U.   
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