﻿ 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 __________________________________________________________________ [24]< | [25]Archive | [26]Submissions | [27]Index | [28]Search | [29]Calendar | [30]RSS | [31]Education | [32]About APOD | [33]Discuss | [34]> __________________________________________________________________ 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/