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

                              Circular Sun Halo
             Image Credit & [3]Copyright: [4]Vincenzo Mirabella

   Explanation: Want to see a ring around the Sun? [5]It's easy to do in
   daytime skies around the world. Created by randomly oriented ice
   crystals in thin high cirrus clouds, circular 22 degree halos are
   visible much more often than rainbows. This one was captured by smart
   phone [6]photography on May 29, 2021 near Rome, Italy. Carefully
   [7]blocking the Sun, for example with a finger tip, is usually all that
   it takes to reveal the common bright halo ring. The halo's
   characteristic angular radius is about equal to the span of your hand,
   thumb to little finger, at the end of your outstretched arm. Want to
   see a [8]ring of fire eclipse? That's harder. The spectacular annular
   phase of [9]today's (October 14) solar eclipse, known as a [10]ring of
   fire, is briefly visible only when standing along the Moon's narrow
   shadow track that passes over limited parts of North, Central, and
   South America. The solar eclipse is partial though, when seen [11]from
   broader regions throughout the Americas.

                         Tomorrow's picture: Sun Day
     __________________________________________________________________

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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]NASA Science Activation
                           & [33]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2310/Vincenzo_Mirabella_20210529_134459.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. http://www.coelum.com/photo-coelum/astroimagers/mirab
   5. http://www.atoptics.co.uk/halo/checkl.htm
   6. http://www.atoptics.co.uk/halo/photo.htm
   7. http://www.atoptics.co.uk/halo/circular.htm
   8. https://apod.nasa.gov/apod/ap231005.html
   9. https://earthsky.org/sun/annular-solar-eclipse-october-14-2023/
  10. https://apod.nasa.gov/apod/ap090125.html
  11. https://blogs.nasa.gov/Watch_the_Skies/2023/09/14/coming-soon-a-ring-of-fire-in-the-sky/
  12. https://apod.nasa.gov/apod/ap231013.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=231014
  22. https://apod.nasa.gov/apod/ap231015.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. https://science.nasa.gov/learners
  33. http://www.mtu.edu/