﻿ 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. 2022 September 21 [2]The featured image just the head of the famous Horsehead Nebula as captured by the Hubble Space Telescope in infrared light. Please see the explanation for more detailed information. The Horsehead Nebula in Infrared from Hubble Image Credit: [3]NASA, [4]ESA, [5]Hubble; Processing: [6]Alexandra Nachman Explanation: While drifting through the cosmos, a magnificent interstellar dust cloud became sculpted by [7]stellar winds and radiation to assume a recognizable shape. Fittingly named the [8]Horsehead Nebula, it is embedded in the [9]vast and complex Orion Nebula (M42). A potentially rewarding but difficult object to [10]view personally with a small telescope, the [11]featured gorgeously detailed image was [12]taken in [13]infrared light by the orbiting [14]Hubble Space Telescope. The [15]dark molecular cloud, roughly 1,500 [16]light years distant, is cataloged as Barnard 33 and is seen above primarily because it is backlit by the nearby massive star [17]Sigma Orionis. The [18]Horsehead Nebula will slowly shift its apparent shape over the next few million years and will eventually be [19]destroyed by [20]high energy starlight. Your Sky Surprise: [21]What picture did APOD feature on your birthday? (post 1995) Tomorrow's picture: open space __________________________________________________________________ [22]< | [23]Archive | [24]Submissions | [25]Index | [26]Search | [27]Calendar | [28]RSS | [29]Education | [30]About APOD | [31]Discuss | [32]> __________________________________________________________________ Authors & editors: [33]Robert Nemiroff ([34]MTU) & [35]Jerry Bonnell ([36]UMCP) NASA Official: Phillip Newman [37]Specific rights apply. [38]NASA Web Privacy Policy and Important Notices A service of: [39]ASD at [40]NASA / [41]GSFC, [42]NASA Science Activation & [43]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2209/HorseheadIr_HubbleNachman_2691.jpg 3. https://www.nasa.gov/ 4. https://www.esa.int/ 5. https://www.nasa.gov/mission_pages/hubble/about 6. https://www.flickr.com/photos/191751486@N08/ 7. https://apod.nasa.gov/apod/ap000318.html 8. https://en.wikipedia.org/wiki/Horsehead_Nebula 9. https://apod.nasa.gov/apod/ap101023.html 10. https://www.youtube.com/watch?v=-PQpNb_yJVE 11. https://www.flickr.com/photos/191751486@N08/50918545833/ 12. http://www.youtube.com/watch?v=wgVjrPp38YE#! 13. https://science.nasa.gov/ems/07_infraredwaves 14. https://www.stsci.edu/hst/HST_overview 15. https://apod.nasa.gov/apod/ap120129.html 16. https://spaceplace.nasa.gov/light-year/en/ 17. https://en.wikipedia.org/wiki/Sigma_Orionis 18. https://apod.nasa.gov/apod/ap031007.html 19. https://media.istockphoto.com/photos/funny-dog-made-a-mess-in-the-room-playful-puppy-french-bulldog-picture-id686918844?k=20&m=686918844&s=612x612&w=0&h=qCMidANjUwWYBM5bHviIradVjzCDlZ0gKJBkpSpVm6Q= 20. https://science.nasa.gov/ems/10_ultravioletwaves 21. https://apod.nasa.gov/apod/calendar/allyears.html 22. https://apod.nasa.gov/apod/ap220920.html 23. https://apod.nasa.gov/apod/archivepix.html 24. https://apod.nasa.gov/apod/lib/apsubmit2015.html 25. https://apod.nasa.gov/apod/lib/aptree.html 26. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 27. https://apod.nasa.gov/apod/calendar/allyears.html 28. https://apod.nasa.gov/apod.rss 29. https://apod.nasa.gov/apod/lib/edlinks.html 30. https://apod.nasa.gov/apod/lib/about_apod.html 31. http://asterisk.apod.com/discuss_apod.php?date=220921 32. https://apod.nasa.gov/apod/ap220922.html 33. http://www.phy.mtu.edu/faculty/Nemiroff.html 34. http://www.phy.mtu.edu/ 35. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 36. http://www.astro.umd.edu/ 37. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 38. https://www.nasa.gov/about/highlights/HP_Privacy.html 39. https://astrophysics.gsfc.nasa.gov/ 40. https://www.nasa.gov/ 41. https://www.nasa.gov/centers/goddard/ 42. https://science.nasa.gov/learners 43. http://www.mtu.edu/