MSGID: 1:153/757.0 58b00c53   
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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.   
      
                                  2022 October 1   
      
                                  Lunation Matrix   
                    Image Credit & Copyright: Tunc Tezel (TWAN)   
      
      Explanation: Observe the Moon every night and you'll see its visible   
      sunlit portion gradually change. In phases progressing from New Moon to   
      Full Moon to New Moon again, a lunar cycle or lunation is completed in   
      about 29.5 days. Top left to bottom right, this 7x4 matrix of   
      telescopic images captures the range of lunar phases for 28 consecutive   
      nights, from the evening of July 29 to the morning of August 26,   
      following an almost complete lunation. No image was taken 24 hours or   
      so just after and just before New Moon, when the lunar phase is at best   
      a narrow crescent, close to the Sun and really hard to see. Finding   
      mostly clear Mediterranean skies required an occasional road trip to   
      complete this lunar cycle project, imaging in early evening for the   
      first half and late evening and early morning for the second half of   
      the lunation. Since all the images are registered at the same scale you   
      can use this matrix to track the change in the Moon's apparent size   
      during the single lunation. For extra credit, find the lunar phase that   
      occurred closest to perigee.   
      
                   Tonight: International Observe the Moon Night   
                         Tomorrow's picture: cosmic cannon   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
                   NASA Web Privacy Policy and Important Notices   
                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
   --- BBBS/Li6 v4.10 Toy-6   
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