Astronomy Picture of the Day

   [1]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 June 20
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                      Major Lunar Standstill 2024-2025
       Image Credit & [3]Copyright: [4]Luca Vanzella, [5]Alister Ling

   Explanation: [6]Edmonton, Alberta, Canada, planet Earth lies on the
   horizon. in this stack of panoramic composite images. In a monthly time
   series arranged vertically top to bottom [7]the ambitious photographic
   project follows the annual north-south swing of sunrise points, from
   [8]June solstice to December solstice and back again. It also follows
   the corresponding, but definitely harder to track, Full Moon rise. Of
   course, the north-south swing of moonrise runs opposite sunrise along
   the horizon. But these rising Full Moons also span a wider range on the
   horizon than the sunrises. That's because the well-planned project
   ([9]as shown in this video) covers the period June 2024 to [10]June
   2025, centered on a major lunar standstill. [11]Major lunar standstills
   represent extremes in the north-south range of moonrise driven by the
   [12]18.6 year precession period of the lunar orbit.

                        Tomorrow's picture: solstice
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     __________________________________________________________________

    Authors & editors: [24]Robert Nemiroff ([25]MTU) & [26]Jerry Bonnell
                                 ([27]UMCP)
          NASA Official: Amber Straughn [28]Specific rights apply.
            [29]NASA Web Privacy, [30]Accessibility, [31]Notices;
                A service of: [32]ASD at [33]NASA / [34]GSFC,
                         [35]NASA Science Activation
                           & [36]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2506/MajorLunarStandstillAPOD.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.flickr.com/people/53851348@N05/
   5. https://www.flickr.com/people/99775232@N07/
   6. https://apod.nasa.gov/apod/ap160922.html
   7. https://www.flickr.com/photos/53851348@N05/54585073867/
   8. https://earthsky.org/astronomy-essentials/everything-you-need-to-know-june-solstice/
   9. https://www.youtube.com/watch?v=u1tkLRdaFNk
  10. https://earthsky.org/tonight/june-full-moon/
  11. https://griffithobservatory.org/extreme-moon-the-major-lunar-standstills-of-2024-2025/
  12. https://en.wikipedia.org/wiki/Lunar_standstill
  13. https://apod.nasa.gov/apod/ap250619.html
  14. https://apod.nasa.gov/apod/archivepix.html
  15. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  16. https://apod.nasa.gov/apod/lib/aptree.html
  17. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  18. https://apod.nasa.gov/apod/calendar/allyears.html
  19. https://apod.com/feed.rss
  20. https://apod.nasa.gov/apod/lib/edlinks.html
  21. https://apod.nasa.gov/apod/lib/about_apod.html
  22. https://asterisk.apod.com/discuss_apod.php?date=250620
  23. https://apod.nasa.gov/apod/ap250621.html
  24. http://www.phy.mtu.edu/faculty/Nemiroff.html
  25. http://www.phy.mtu.edu/
  26. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  27. http://www.astro.umd.edu/
  28. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  29. https://www.nasa.gov/about/highlights/HP_Privacy.html
  30. https://www.nasa.gov/general/accessibility/
  31. https://www.nasa.gov/privacy/
  32. https://astrophysics.gsfc.nasa.gov/
  33. https://www.nasa.gov/
  34. https://www.nasa.gov/centers/goddard/
  35. https://science.nasa.gov/learners
  36. http://www.mtu.edu/