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                        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
     __________________________________________________________________

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    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/