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.

                               2023 October 25

         IFRAME: [2]https://www.youtube.com/embed/J3_88eyN44w?rel=0

                  Gone in 60 Seconds: A Green Flash Sunset
                   Video Credit & Copyright: [3]Tengyu Cai

   Explanation: In 60 seconds, this setting Sun will turn green. Actually,
   the top of [4]the Sun already appears not only green, but wavey --
   along with all of its edges. The Sun itself is unchanged -- both
   [5]effects are caused by looking along hot and cold layers in
   [6]Earth's atmosphere. The unusual color is known as a [7]green flash
   and occurs because these atmospheric layers not only shift background
   images but disperse colors into slightly different directions, like a
   [8]prism. The featured video was captured earlier this month off the
   coast of [9]Hawai[10]i, [11]USA. After [12]waiting those 60 seconds, at
   the video's end, the upper part of [13]the Sun seems to hover alone in
   space, while turning not only [14]green, but [15]blue. Then suddenly,
   the Sun appears to shrink to nothing -- only to return tomorrow.

                       Tomorrow's picture: open space
     __________________________________________________________________

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    Authors & editors: [27]Robert Nemiroff ([28]MTU) & [29]Jerry Bonnell
                                 ([30]UMCP)
          NASA Official: Phillip Newman [31]Specific rights apply.
              [32]NASA Web Privacy Policy and Important Notices
                A service of: [33]ASD at [34]NASA / [35]GSFC,
                         [36]NASA Science Activation
                           & [37]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://www.youtube.com/embed/J3_88eyN44w?rel=0
   3. https://www.instagram.com/tengyu.cai/
   4. https://science.nasa.gov/sun/
   5. https://apod.nasa.gov/apod/ap090223.html
   6. https://climate.nasa.gov/news/2919/earths-atmosphere-a-multi-layered-cake/
   7. https://en.wikipedia.org/wiki/Green_flash
   8. https://phet.colorado.edu/sims/html/bending-light/latest/bending-light_en.html
   9. https://youtu.be/dB-qilyUX2Q
  10. https://en.wikipedia.org/wiki/Hawaii
  11. https://www.cia.gov/the-world-factbook/countries/united-states/
  12. https://i.cbc.ca/1.6583971.1663276172!/fileImage/httpImage/cat-boredom.jpg
  13. https://apod.nasa.gov/apod/ap230222.html
  14. https://apod.nasa.gov/apod/ap230328.html
  15. https://apod.nasa.gov/apod/ap110104.html
  16. https://apod.nasa.gov/apod/ap231024.html
  17. https://apod.nasa.gov/apod/archivepix.html
  18. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  19. https://apod.nasa.gov/apod/lib/aptree.html
  20. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  21. https://apod.nasa.gov/apod/calendar/allyears.html
  22. https://apod.com/feed.rss
  23. https://apod.nasa.gov/apod/lib/edlinks.html
  24. https://apod.nasa.gov/apod/lib/about_apod.html
  25. https://asterisk.apod.com/discuss_apod.php?date=231025
  26. https://apod.nasa.gov/apod/ap231026.html
  27. http://www.phy.mtu.edu/faculty/Nemiroff.html
  28. http://www.phy.mtu.edu/
  29. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  30. http://www.astro.umd.edu/
  31. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  32. https://www.nasa.gov/about/highlights/HP_Privacy.html
  33. https://astrophysics.gsfc.nasa.gov/
  34. https://www.nasa.gov/
  35. https://www.nasa.gov/centers/goddard/
  36. https://science.nasa.gov/learners
  37. http://www.mtu.edu/