¿ 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. 2020 March 29 [2]See Explanation. Moving the cursor over the image will bring up an annotated version. Clicking on the image will bring up the highest resolution version available. A 212-Hour Exposure of Orion Image Credit & Copyright: [3]Stanislav Volskiy, Rollover Annotation: [4]Judy Schmidt Explanation: The constellation of Orion is much more than three stars in a row. It is a direction in space that is [5]rich with impressive nebulas. To better appreciate this well-known swath of sky, an [6]extremely long exposure was taken over many clear nights in 2013 and 2014. After 212 hours of camera time and an [7]additional year of processing, the featured 1400-exposure collage spanning over 40 times the [8]angular diameter of [9]the Moon emerged. Of the many interesting details that have become visible, one that particularly draws the eye is [10]Barnard's Loop, the bright red circular filament arcing down from the middle. The Rosette Nebula is not the giant red nebula near the top of the image -- that is a larger but lesser known nebula known as Lambda Orionis. The [11]Rosette Nebula is visible, though: it is the red and white nebula on the upper left. The bright orange star just above the frame center is [12]Betelgeuse, while the bright blue star on the lower right is [13]Rigel. Other famous nebulas visible include the [14]Witch Head Nebula, the [15]Flame Nebula, the [16]Fox Fur Nebula, and, if you know just where to look, the comparatively small [17]Horsehead Nebula. About those [18]famous three stars that cross the belt of [19]Orion the Hunter -- in this busy frame they can be hard to locate, but a discerning eye will find them just below and to the right of the image center. Tomorrow's picture: shadow saturn __________________________________________________________________ [20]< | [21]Archive | [22]Submissions | [23]Index | [24]Search | [25]Calendar | [26]RSS | [27]Education | [28]About APOD | [29]Discuss | [30]> __________________________________________________________________ Authors & editors: [31]Robert Nemiroff ([32]MTU) & [33]Jerry Bonnell ([34]UMCP) NASA Official: Phillip Newman [35]Specific rights apply. [36]NASA Web Privacy Policy and Important Notices A service of: [37]ASD at [38]NASA / [39]GSFC & [40]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/1511/Orion212_Volskiy_5574.jpg 3. https://volskiy.smugmug.com/ 4. http://geckzilla.com/ 5. https://apod.nasa.gov/apod/ap150316.html 6. https://volskiy.smugmug.com/Nebulas/i-8dZ6DdL/0/O/Orion_2787x2412px_25_percent_CR1_2_sRGB.jpg 7. https://catsareontop.com/wp-content/uploads/2018/01/bored-feature.jpg 8. https://en.wikipedia.org/wiki/Angular_diameter 9. http://moon.nasa.gov/about.cfm 10. https://apod.nasa.gov/apod/ap090224.html 11. https://apod.nasa.gov/apod/ap150225.html 12. https://apod.nasa.gov/apod/ap100106.html 13. http://earthsky.org/brightest-stars/blue-white-rigel-is-orions-brightest-star 14. https://apod.nasa.gov/apod/ap151030.html 15. https://apod.nasa.gov/apod/ap141209.html 16. https://apod.nasa.gov/apod/ap080422.html 17. https://apod.nasa.gov/apod/ap150513.html 18. https://apod.nasa.gov/apod/ap090210.html 19. https://en.wikipedia.org/wiki/Orion_(constellation) 20. https://apod.nasa.gov/apod/ap200328.html 21. https://apod.nasa.gov/apod/archivepix.html 22. https://apod.nasa.gov/apod/lib/apsubmit2015.html 23. https://apod.nasa.gov/apod/lib/aptree.html 24. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 25. https://apod.nasa.gov/apod/calendar/allyears.html 26. https://apod.nasa.gov/apod.rss 27. https://apod.nasa.gov/apod/lib/edlinks.html 28. https://apod.nasa.gov/apod/lib/about_apod.html 29. http://asterisk.apod.com/discuss_apod.php?date=200329 30. https://apod.nasa.gov/apod/ap200330.html 31. http://www.phy.mtu.edu/faculty/Nemiroff.html 32. http://www.phy.mtu.edu/ 33. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 34. http://www.astro.umd.edu/ 35. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 36. https://www.nasa.gov/about/highlights/HP_Privacy.html 37. https://astrophysics.gsfc.nasa.gov/ 38. https://www.nasa.gov/ 39. https://www.nasa.gov/centers/goddard/ 40. http://www.mtu.edu/