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 September 6
        [2]The featured image shows a dark cloud topped with a bright
      multicolored cloud. Please see the explanation for more detailed
                                information.

                    An Iridescent Pileus Cloud over China
           Image Credit & Copyright: [3]Jiaqi Sun （孙嘉琪）

   Explanation: Yes, but how many dark clouds have a multicolored lining?
   Pictured, behind this darker cloud, is a [4]pileus [5]iridescent cloud,
   a group of water droplets that have a uniformly similar size and [6]so
   together [7]diffract different colors of sunlight by different amounts.
   The [8]featured image was taken last month in [9]Pu'[10]er, [11]Yunnan
   Province, [12]China. Also captured were unusual [13]cloud ripples above
   the [14]pileus cloud. The formation of a rare pileus cloud capping a
   common [15]cumulus cloud is an indication that the lower cloud is
   [16]expanding upward and might well develop into a [17]storm.

              Explore Your Universe: [18]Random APOD Generator
                         Tomorrow's picture: big red
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    Authors & editors: [30]Robert Nemiroff ([31]MTU) & [32]Jerry Bonnell
                                 ([33]UMCP)
          NASA Official: Phillip Newman [34]Specific rights apply.
              [35]NASA Web Privacy Policy and Important Notices
                A service of: [36]ASD at [37]NASA / [38]GSFC,
                         [39]NASA Science Activation
                           & [40]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2209/Pileus_Jiaqi_4032.jpg
   3. https://m.weibo.cn/u/7430235891
   4. https://www.atoptics.co.uk/fz503.htm
   5. https://en.wikipedia.org/wiki/Cloud_iridescence
   6. https://www.atoptics.co.uk/droplets/irid1.htm
   7. https://en.wikipedia.org/wiki/Diffraction
   8. https://m.weibo.cn/detail/4803180637195307
   9. https://youtu.be/roWT-ETC504
  10. https://en.wikipedia.org/wiki/Pu'er_City
  11. https://en.wikipedia.org/wiki/Yunnan
  12. https://en.wikipedia.org/wiki/China
  13. https://spaceplace.nasa.gov/cloud-scramble/en/
  14. https://en.wikipedia.org/wiki/Pileus_cloud
  15. https://scool.larc.nasa.gov/GLOBE/cumulus.html
  16. https://youtu.be/ZfssmGOPCM4
  17. https://apod.nasa.gov/apod/ap210613.html
  18. http://apod.nasa.gov/apod/random_apod.html
  19. https://apod.nasa.gov/apod/ap220905.html
  20. https://apod.nasa.gov/apod/archivepix.html
  21. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  22. https://apod.nasa.gov/apod/lib/aptree.html
  23. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  24. https://apod.nasa.gov/apod/calendar/allyears.html
  25. https://apod.nasa.gov/apod.rss
  26. https://apod.nasa.gov/apod/lib/edlinks.html
  27. https://apod.nasa.gov/apod/lib/about_apod.html
  28. http://asterisk.apod.com/discuss_apod.php?date=220906
  29. https://apod.nasa.gov/apod/ap220907.html
  30. http://www.phy.mtu.edu/faculty/Nemiroff.html
  31. http://www.phy.mtu.edu/
  32. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  33. http://www.astro.umd.edu/
  34. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  35. https://www.nasa.gov/about/highlights/HP_Privacy.html
  36. https://astrophysics.gsfc.nasa.gov/
  37. https://www.nasa.gov/
  38. https://www.nasa.gov/centers/goddard/
  39. https://science.nasa.gov/learners
  40. http://www.mtu.edu/