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.

                              2023 November 20
     [2]A dark nebula resembling the head of a horse is imaged before a
    red-glowing background. Stars appear throughout the image. Please see
               the explanation for more detailed information.

                            The Horsehead Nebula
     Image Credit & Copyright: [3]Mark Hanson & [4]Martin Pugh, [5]SSRO,
                         [6]PROMPT, [7]CTIO, [8]NSF

   Explanation: [9]Sculpted by stellar winds and radiation, a magnificent
   interstellar dust cloud by chance has assumed this [10]recognizable
   shape. Fittingly named the [11]Horsehead Nebula, it is some 1,500
   light-years [12]distant, embedded in the vast [13]Orion cloud complex.
   About five light-years "tall," the dark cloud is cataloged as
   [14]Barnard 33 and is visible only because its [15]obscuring dust is
   silhouetted against the glowing red emission nebula IC 434. [16]Stars
   are forming within the dark cloud. [17]Contrasting blue reflection
   nebula NGC 2023, surrounding a hot, young [18]star, is at the lower
   left of [19]the full image. The featured gorgeous [20]color image
   combines both [21]narrowband and [22]broadband images recorded using
   several different telescopes.

                      New: [23]Follow APOD on Telegram
                     Tomorrow's picture: supernova wisp
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    Authors & editors: [35]Robert Nemiroff ([36]MTU) & [37]Jerry Bonnell
                                 ([38]UMCP)
          NASA Official: Phillip Newman [39]Specific rights apply.
              [40]NASA Web Privacy Policy and Important Notices
                A service of: [41]ASD at [42]NASA / [43]GSFC,
                         [44]NASA Science Activation
                           & [45]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2311/Horsehead_Hanson_2604.jpg
   3. https://www.hansonastronomy.com/bio
   4. https://www.martinpughastrophotography.space/about
   5. http://www.starshadows.com/
   6. https://en.wikipedia.org/wiki/PROMPT_Telescopes
   7. https://noirlab.edu/public/programs/ctio/
   8. https://www.nsf.gov/
   9. https://apod.nasa.gov/apod/ap080313.html
  10. https://en.wikipedia.org/wiki/Seahorse
  11. https://en.wikipedia.org/wiki/Horsehead_Nebula
  12. https://youtu.be/hgTrLozRj40
  13. https://apod.nasa.gov/apod/ap070125.html
  14. http://messier.seds.org/xtra/ngc/b33.html
  15. https://apod.nasa.gov/apod/ap230129.html
  16. https://science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve/
  17. https://apod.nasa.gov/apod/ap160608.html
  18. https://science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve
  19. https://apod.nasa.gov/apod/image/1912/Horsehead_Hanson_2604.jpg
  20. https://www.hansonastronomy.com/ic-434ngc2023
  21. https://www.thepoke.co.uk/wp-content/uploads/2016/09/pets-vs-furniture-cat-squeezed-in-couch.jpg
  22. https://s-media-cache-ak0.pinimg.com/736x/e1/6c/e4/e16ce47242406ac2d278f10619282d13.jpg
  23. https://t.me/apod_telegram
  24. https://apod.nasa.gov/apod/ap231119.html
  25. https://apod.nasa.gov/apod/archivepix.html
  26. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  27. https://apod.nasa.gov/apod/lib/aptree.html
  28. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  29. https://apod.nasa.gov/apod/calendar/allyears.html
  30. https://apod.com/feed.rss
  31. https://apod.nasa.gov/apod/lib/edlinks.html
  32. https://apod.nasa.gov/apod/lib/about_apod.html
  33. https://asterisk.apod.com/discuss_apod.php?date=231120
  34. https://apod.nasa.gov/apod/ap231121.html
  35. http://www.phy.mtu.edu/faculty/Nemiroff.html
  36. http://www.phy.mtu.edu/
  37. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  38. http://www.astro.umd.edu/
  39. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  40. https://www.nasa.gov/about/highlights/HP_Privacy.html
  41. https://astrophysics.gsfc.nasa.gov/
  42. https://www.nasa.gov/
  43. https://www.nasa.gov/centers/goddard/
  44. https://science.nasa.gov/learners
  45. http://www.mtu.edu/