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.

                                 2022 May 14
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                           Ice Halos by Moonlight
     Image Credit & [3]Copyright: [4]Alan Dyer, Amazingsky.com, [5]TWAN

   Explanation: An almost full moon on April 15 brought these luminous
   apparitions to a northern spring night over Alberta Canada. On that
   night, bright moonlight refracted and reflected by hexagonal ice
   crystals in high clouds created a [6]complex of halos and arcs more
   commonly [7]seen by sunlight in daytime skies. While the colors of the
   arcs and moondogs or paraselenae were just visible to the unaided eye,
   a blend of exposures ranging from 30 seconds to 1/20 second was used to
   render this moonlit wide-angle skyscape. The Big Dipper at the top of
   the frame sits just above [8]a smiling and rainbow-hued circumzenithal
   arc. With Arcturus left and Regulus toward the right the Moon is
   centered in its often spotted [9]22 degree halo. May 15 will also see
   the bright light of a Full Moon shining in Earth's night skies.
   Tomorrow's Full Moon will be dimmed for a while though, as it slides
   through Earth's shadow in a total [10]lunar eclipse.

                  Watch: [11]May 15-16 Total Lunar Eclipse
                   Tomorrow's picture: colors of the moon
     __________________________________________________________________

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    Authors & editors: [23]Robert Nemiroff ([24]MTU) & [25]Jerry Bonnell
                                 ([26]UMCP)
          NASA Official: Phillip Newman [27]Specific rights apply.
              [28]NASA Web Privacy Policy and Important Notices
                A service of: [29]ASD at [30]NASA / [31]GSFC
                           & [32]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2205/LunarHaloComplex.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. http://www.amazingsky.com/
   5. http://www.twanight.org/
   6. https://en.wikipedia.org/wiki/Atmospheric_optics#Halos
   7. https://apod.nasa.gov/apod/ap181221.html
   8. https://apod.nasa.gov/apod/ap220311.html
   9. https://apod.nasa.gov/apod/ap150403.html
  10. https://solarsystem.nasa.gov/eclipses/about-eclipses/types/#otp_lunar_eclipses
  11. https://moon.nasa.gov/news/172/what-you-need-to-know-about-the-lunar-eclipse/
  12. https://apod.nasa.gov/apod/ap220513.html
  13. https://apod.nasa.gov/apod/archivepix.html
  14. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  15. https://apod.nasa.gov/apod/lib/aptree.html
  16. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  17. https://apod.nasa.gov/apod/calendar/allyears.html
  18. https://apod.nasa.gov/apod.rss
  19. https://apod.nasa.gov/apod/lib/edlinks.html
  20. https://apod.nasa.gov/apod/lib/about_apod.html
  21. http://asterisk.apod.com/discuss_apod.php?date=220514
  22. https://apod.nasa.gov/apod/ap220515.html
  23. http://www.phy.mtu.edu/faculty/Nemiroff.html
  24. http://www.phy.mtu.edu/
  25. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  26. http://www.astro.umd.edu/
  27. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  28. https://www.nasa.gov/about/highlights/HP_Privacy.html
  29. https://astrophysics.gsfc.nasa.gov/
  30. https://www.nasa.gov/
  31. https://www.nasa.gov/centers/goddard/
  32. http://www.mtu.edu/