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.

                              2019 September 12
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                     The Iris Nebula in a Field of Dust
                Image Credit & [3]Copyright: [4]Markus Bauer

   Explanation: [5]These cosmic dust clouds drift some 1,300 light-years
   away along the fertile starfields of the constellation Cepheus. [6]The
   beautiful Iris Nebula, also known as NGC 7023, blossoms at the upper
   left. Not the only nebula in the sky to evoke the imagery of flowers,
   its pretty, symmetric form spans about 6 light-years. This nebula's
   dominant blue color is characteristic of the pervasive dust grains
   reflecting light from a nearby hot, bluish star. But darker, obscuring
   dust clouds cover most of the nearly 4 degree wide field of view. [7]At
   the right is the LDN 1147/1158 complex of [8]Lynds Dark Nebulae. Stars
   are forming there, still hidden [9]within the dark cloud cores. A
   search through the sharp image can identify [10]Herbig-Haro objects
   though, jets of shocked glowing gas emanating from recently formed
   stars.

                       Tomorrow's picture: two comets
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    Authors & editors: [22]Robert Nemiroff ([23]MTU) & [24]Jerry Bonnell
                                 ([25]UMCP)
          NASA Official: Phillip Newman [26]Specific rights apply.
              [27]NASA Web Privacy Policy and Important Notices
                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/1909/IRISNebulaSurroundingsNGC7023.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.astrobin.com/users/Detoxx/
   5. https://www.astrobin.com/168lch/0/?nc=user
   6. https://apod.nasa.gov/apod/ap160506.html
   7. http://www.deeplook.astronomie.at/ldn 1152.htm
   8. https://ui.adsabs.harvard.edu/abs/1962ApJS....7....1L/abstract
   9. https://apod.nasa.gov/apod/ap190531.html
  10. https://hubblesite.org/image/3656/news
  11. https://apod.nasa.gov/apod/ap190911.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=190912
  21. https://apod.nasa.gov/apod/ap190913.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/