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 July 31
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                        IC 1795: The Fishhead Nebula
                   Image Credit & Copyright: [3]Alan Pham

   Explanation: To some, this nebula looks like the head of a [4]fish.
   However, [5]this colorful cosmic portrait really features [6]glowing
   gas and obscuring dust clouds in IC 1795, a star forming region in the
   northern [7]constellation Cassiopeia. The nebula's colors were created
   by adopting the [8]Hubble color palette for mapping narrow emission
   from oxygen, hydrogen, and sulfur atoms to blue, green and red colors,
   and further blending the data with images of the region recorded
   through broadband filters. Not far on the sky from the famous [9]Double
   Star Cluster in Perseus, IC 1795 is itself located next to IC 1805, the
   [10]Heart Nebula, as part of a [11]complex of star forming regions that
   lie at the edge of a large molecular cloud. Located just over 6,000
   [12]light-years away, the larger star forming complex sprawls along the
   Perseus spiral arm of our [13]Milky Way Galaxy. At that distance, this
   picture would span about 70 light-years across IC 1795.

     Astrophysicists: [14]Browse 2,000+ codes in the Astrophysics Source
                                Code Library
                       Tomorrow's picture: open space
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    Authors & editors: [26]Robert Nemiroff ([27]MTU) & [28]Jerry Bonnell
                                 ([29]UMCP)
          NASA Official: Phillip Newman [30]Specific rights apply.
              [31]NASA Web Privacy Policy and Important Notices
                A service of: [32]ASD at [33]NASA / [34]GSFC
                           & [35]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/1907/FishheadNebula_Pham_2401.jpg
   3. https://www.astrobin.com/users/PlanetOrion/
   4. https://en.wikipedia.org/wiki/Fish#/media/File:Lampanyctodes_hectoris_(Hector's_lanternfish)2.png
   5. http://www.astrobin.com/407970/
   6. http://www-ssg.sr.unh.edu/ism/what1.html
   7. https://en.wikipedia.org/wiki/Cassiopeia_(constellation)
   8. http://bf-astro.com/hubblep.htm
   9. https://apod.nasa.gov/apod/ap091204.html
  10. https://apod.nasa.gov/apod/ap090214.html
  11. http://www.atlasoftheuniverse.com/nebulae/ic1805.html
  12. http://www.grc.nasa.gov/WWW/k-12/Numbers/Math/Mathematical_Thinking/how_long_is_a_light_year.htm
  13. https://apod.nasa.gov/apod/ap080606.html
  14. http://ascl.net/
  15. https://apod.nasa.gov/apod/ap190730.html
  16. https://apod.nasa.gov/apod/archivepix.html
  17. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  18. https://apod.nasa.gov/apod/lib/aptree.html
  19. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  20. https://apod.nasa.gov/apod/calendar/allyears.html
  21. https://apod.nasa.gov/apod.rss
  22. https://apod.nasa.gov/apod/lib/edlinks.html
  23. https://apod.nasa.gov/apod/lib/about_apod.html
  24. http://asterisk.apod.com/discuss_apod.php?date=190731
  25. https://apod.nasa.gov/apod/ap190801.html
  26. http://www.phy.mtu.edu/faculty/Nemiroff.html
  27. http://www.phy.mtu.edu/
  28. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  29. http://www.astro.umd.edu/
  30. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  31. https://www.nasa.gov/about/highlights/HP_Privacy.html
  32. https://astrophysics.gsfc.nasa.gov/
  33. https://www.nasa.gov/
  34. https://www.nasa.gov/centers/goddard/
  35. http://www.mtu.edu/