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                        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.

                                2021 March 16
     [2]IC 1318: The Butterfly Nebula in Gas and Dust. See Explanation.

                IC 1318: The Butterfly Nebula in Gas and Dust
                   Image Credit & Copyright: [3]Alan Pham

   Explanation: In the constellation of the [4]swan near the nebula of the
   pelican lies the [5]gas cloud of the butterfly [6]next to a star known
   as the hen. That star, given the proper name [7]Sadr, is just to the
   right of the featured frame, but the central [8]Butterfly Nebula,
   designated IC 1318, is shown in high resolution. The intricate patterns
   in the bright gas and [9]dark dust are caused by complex interactions
   between [10]interstellar winds, radiation pressures, magnetic fields,
   and gravity. The [11]featured telescopic view captures [12]IC 1318's
   characteristic emission from ionized [13]sulfur, [14]hydrogen, and
   [15]oxygen atoms mapped to the red, green, and blue hues of the popular
   [16]Hubble Palette. The portion of the Butterfly Nebula pictured spans
   about 100 [17]light years and lies about 4000 light years away.

                     Tomorrow's picture: aurora jupiter
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    Authors & editors: [29]Robert Nemiroff ([30]MTU) & [31]Jerry Bonnell
                                 ([32]UMCP)
          NASA Official: Phillip Newman [33]Specific rights apply.
              [34]NASA Web Privacy Policy and Important Notices
                A service of: [35]ASD at [36]NASA / [37]GSFC
                           & [38]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2103/IC1318_Pham_3200.jpg
   3. https://www.instagram.com/planetorion/
   4. https://en.wikipedia.org/wiki/Cygnus_(constellation)
   5. https://apod.nasa.gov/apod/ap210211.html
   6. https://apod.nasa.gov/apod/ap121130.html
   7. https://en.wikipedia.org/wiki/Gamma_Cygni
   8. http://www.atlasoftheuniverse.com/nebulae/ic1318.html
   9. https://apod.nasa.gov/apod/ap201122.html
  10. https://www.nasa.gov/content/goddard/interstellar-wind-changed-direction-over-40-years
  11. https://www.astrobin.com/utpss4/B/
  12. https://en.wikipedia.org/wiki/Sadr_Region
  13. https://youtu.be/mddfu3TXaRw
  14. https://en.wikipedia.org/wiki/H-alpha
  15. https://youtu.be/diP_ngebIxI
  16. http://hubble.stsci.edu/gallery/behind_the_pictures/meaning_of_color/eagle.php
  17. https://spaceplace.nasa.gov/light-year/en/
  18. https://apod.nasa.gov/apod/ap210315.html
  19. https://apod.nasa.gov/apod/archivepix.html
  20. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  21. https://apod.nasa.gov/apod/lib/aptree.html
  22. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  23. https://apod.nasa.gov/apod/calendar/allyears.html
  24. https://apod.nasa.gov/apod.rss
  25. https://apod.nasa.gov/apod/lib/edlinks.html
  26. https://apod.nasa.gov/apod/lib/about_apod.html
  27. http://asterisk.apod.com/discuss_apod.php?date=210316
  28. https://apod.nasa.gov/apod/ap210317.html
  29. http://www.phy.mtu.edu/faculty/Nemiroff.html
  30. http://www.phy.mtu.edu/
  31. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  32. http://www.astro.umd.edu/
  33. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  34. https://www.nasa.gov/about/highlights/HP_Privacy.html
  35. https://astrophysics.gsfc.nasa.gov/
  36. https://www.nasa.gov/
  37. https://www.nasa.gov/centers/goddard/
  38. http://www.mtu.edu/