MSGID: 1:153/757.0 1bf20b19   
   TZUTC: -0700   
   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.   
      
                                 2025 September 21   
      A city skyline is shown behind some hills and a river. The path of the   
           Sun is shown for several times during a year. Please see the   
                    explanation for more detailed information.   
      
                                  Equinox Sunset   
                            Image Credit: Luca Vanzella   
      
      Explanation: Does the Sun set in the same direction every day? No, the   
      direction of sunset depends on the time of the year. Although the Sun   
      always sets approximately toward the west, on an equinox like today the   
      Sun sets directly toward the west. After tomorrow's September equinox,   
      the Sun will set increasingly toward the southwest, reaching its   
      maximum displacement at the December solstice. Before today's September   
      equinox, the Sun had set toward the northwest, reaching its maximum   
      displacement at the June solstice. The featured time-lapse image shows   
      seven bands of the Sun setting one day each month from 2019 December   
      through 2020 June. These image sequences were taken from Alberta,   
      Canada -- well north of the Earth's equator -- and feature the city of   
      Edmonton in the foreground. The middle band shows the Sun setting   
      during the last equinox -- in March. From this location, the Sun will   
      set along this same equinox band again tomorrow.   
      
                       Tomorrow's picture: equinox on Saturn   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
                     NASA Web Privacy, Accessibility, Notices;   
                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
   --- BBBS/Li6 v4.10 Toy-7   
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