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 7
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                            Firefall by Moonlight
                Image Credit & [3]Copyright: [4]Tara Mostofi

   Explanation: On certain dates in February, an elusive firefall can be
   spotted at sunset in [5]Yosemite National Park, when water flows, the
   weather cooperates and the direction to the setting Sun is just right.
   Often photographed from vantage points below, at the right moment the
   park's [6]seasonal Horsetail Fall is isolated in the shadows of the
   steep walls [7]of El Capitan. Then, still illuminated with rays of
   reddened sunlight the waterfall briefly takes on a dramatic, fiery
   appearance. But a [8]Horsetail firefall can be photographed by
   moonlight too. Even more elusive by moonlight, the firefall effect can
   also be seen when a bright Moon sets at the right direction along the
   western horizon. And skies were clear enough for this [9]well-planned
   imaging of an ephemeral Horsetail firefall, lit by a bright gibbous
   Moon setting in the early morning hours of April 15.

                     Tomorrow's picture: the inner rings
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    Authors & editors: [21]Robert Nemiroff ([22]MTU) & [23]Jerry Bonnell
                                 ([24]UMCP)
          NASA Official: Phillip Newman [25]Specific rights apply.
              [26]NASA Web Privacy Policy and Important Notices
                A service of: [27]ASD at [28]NASA / [29]GSFC
                           & [30]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2205/2021-04-15_443amLunarFirefall1080P.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.youtube.com/channel/UCBOHcRksI38-AR1ryQ5RKhg
   5. https://www.nps.gov/yose/index.htm
   6. https://www.nps.gov/yose/planyourvisit/horsetailfall.htm
   7. https://apod.nasa.gov/apod/ap140321.html
   8. https://www.nps.gov/media/video/view.htm?id=FB33189C-F125-5646-87DC69A46F089202
   9. https://www.youtube.com/watch?v=vDlaUC4RMIg
  10. https://apod.nasa.gov/apod/ap220506.html
  11. https://apod.nasa.gov/apod/archivepix.html
  12. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  13. https://apod.nasa.gov/apod/lib/aptree.html
  14. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  15. https://apod.nasa.gov/apod/calendar/allyears.html
  16. https://apod.nasa.gov/apod.rss
  17. https://apod.nasa.gov/apod/lib/edlinks.html
  18. https://apod.nasa.gov/apod/lib/about_apod.html
  19. http://asterisk.apod.com/discuss_apod.php?date=220507
  20. https://apod.nasa.gov/apod/ap220508.html
  21. http://www.phy.mtu.edu/faculty/Nemiroff.html
  22. http://www.phy.mtu.edu/
  23. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  24. http://www.astro.umd.edu/
  25. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  26. https://www.nasa.gov/about/highlights/HP_Privacy.html
  27. https://astrophysics.gsfc.nasa.gov/
  28. https://www.nasa.gov/
  29. https://www.nasa.gov/centers/goddard/
  30. http://www.mtu.edu/