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   CHRS: LATIN-1 2   
                           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 January 22   
      A black and white image of the Moon and a mountain are shown. Both are   
        half lit by the Sun, with the other half shadowed. The half-moon is   
       directly above the mountain peak. Please see the explanation for more   
                               detailed information.   
      
                           Shadows of Mountain and Moon   
                    Image Credit & Copyright: Enzo Massa Micon   
      
      Explanation: Can the Moon and a mountain really cast similar shadows?   
      Yes, but the division between light and dark does not have to be   
      aligned. Pictured, a quarter moon was captured above the mountain   
      Grivola in Italy in early October of 2022. The Sun is to the right of   
      the featured picturesque landscape, illuminating the right side of the   
      Moon in a similar way that it illuminates the right side of the   
      mountain. This lunar phase is called "quarter" because the lit fraction   
      visible from Earth is one quarter of the entire lunar surface. Digital   
      post-processing of this single exposure gave both gigantic objects more   
      prominence. Capturing the terminator of this quarter moon in close   
      alignment with nearly vertical mountain ridge required careful timing   
      because the Earth rotates once a day.   
      
                           Tomorrow's picture: sky wide   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Ryan Smallcomb; Specific rights apply.   
                   NASA Web Privacy Policy and Important Notices   
                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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