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 July 9
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                    Noctilucent Clouds and Comet NEOWISE
               Image Credit & [3]Copyright: [4]Emmanuel Paoly

   Explanation: These silvery blue waves washing over a tree-lined horizon
   in the eastern French Alps are [5]noctilucent clouds. From high in
   planet Earth's mesosphere, they reflect sunlight in [6]this predawn
   skyscape taken on July 8. This summer, the night-shining clouds are not
   new to the northern high-latitudes. [7]Comet NEOWISE is though. Also
   known as C/2020 F3, the comet was discovered in March by the
   [8]Earth-orbiting Near Earth Object Wide-field Infrared Survey Explorer
   ([9]NEOWISE) satellite. It's now emerging in morning twilight only just
   visible to the unaided eye from a clear location [10]above the
   northeastern horizon.

                     Tomorrow's picture: pixels in space
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    Authors & editors: [22]Robert Nemiroff ([23]MTU) & [24]Jerry Bonnell
                                 ([25]UMCP)
          NASA Official: Phillip Newman [26]Specific rights apply.
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                A service of: [28]ASD at [29]NASA / [30]GSFC
                           & [31]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2007/noctilucentNeowisePaoly.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.flickr.com/photos/184931432@N04/with/50089425658/
   5. https://apod.nasa.gov/apod/ap200704.html
   6. https://www.flickr.com/photos/184931432@N04/50089425658/
   7. https://apod.nasa.gov/apod/ap200707.html
   8. https://www.flickr.com/photos/nasa2explore/50087542858/in/album-72157713159009527/
   9. https://www.nasa.gov/mission_pages/neowise/main/index.html
  10. https://earthsky.org/space/how-to-see-comet-c2020-f3-neowise
  11. https://apod.nasa.gov/apod/ap200708.html
  12. https://apod.nasa.gov/apod/archivepix.html
  13. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  14. https://apod.nasa.gov/apod/lib/aptree.html
  15. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  16. https://apod.nasa.gov/apod/calendar/allyears.html
  17. https://apod.nasa.gov/apod.rss
  18. https://apod.nasa.gov/apod/lib/edlinks.html
  19. https://apod.nasa.gov/apod/lib/about_apod.html
  20. http://asterisk.apod.com/discuss_apod.php?date=200709
  21. https://apod.nasa.gov/apod/ap200710.html
  22. http://www.phy.mtu.edu/faculty/Nemiroff.html
  23. http://www.phy.mtu.edu/
  24. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  25. http://www.astro.umd.edu/
  26. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  27. https://www.nasa.gov/about/highlights/HP_Privacy.html
  28. https://astrophysics.gsfc.nasa.gov/
  29. https://www.nasa.gov/
  30. https://www.nasa.gov/centers/goddard/
  31. http://www.mtu.edu/