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.

                                2020 June 19
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                             The Veins of Heaven
   Image Credit & [3]Copyright: [4]Ruslan Merzlyakov ([5]RMS Photography)

   Explanation: [6]Transfusing sunlight through a darkened sky, [7]this
   beautiful display of noctilucent clouds was captured earlier this week,
   reflected in calm waters from Nykobing Mors, Denmark. From the edge of
   space, about 80 kilometers above Earth's surface, the [8]icy clouds
   themselves still reflect sunlight, though the Sun is below the horizon
   as seen from the ground. Usually spotted at high latitudes in summer
   months the night shining clouds have made an early [9]appearance this
   year as northern nights grow short. Also known as polar mesopheric
   clouds they [10]are understood to form as water vapor driven into the
   cold upper atmosphere condenses on the fine dust particles supplied by
   disintegrating meteors or volcanic ash. NASA's AIM mission provides
   daily projections of noctilucent clouds [11]as seen from space.

                    Tomorrow's picture: solstice in space
     __________________________________________________________________

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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/2006/IMG_4164a.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.facebook.com/rmerzlyakov
   5. https://www.facebook.com/astrorms/
   6. http://vimeo.com/101077253
   7. https://www.facebook.com/astrorms/photos/a.386953088074201/2594768450625976/?type=3&theater
   8. http://www.atoptics.co.uk/highsky/nlc1.htm
   9. https://www.nasa.gov/feature/goddard/2020/nasa-aim-spots-first-arctic-noctilucent-clouds-of-the-season-polar-mesospheric
  10. http://science.nasa.gov/science-news/science-at-nasa/2013/23dec_antarctica/
  11. http://www.nasa.gov/mission_pages/aim/index.html
  12. https://apod.nasa.gov/apod/ap200618.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=200619
  22. https://apod.nasa.gov/apod/ap200620.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/