Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sun Oct 14 2018 07:29:02 Astronomy Picture of the Day Astronomy Picture of the Day Discover the cosmos! [1] Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2018 October 14 [2] Orion in Red and Blue Image Credit & Copyright: David Lindemann [3] Explanation: When did Orion become so flashy? This colorful rendition of part of the constellation of Orion [4] comes from red light emitted by hydrogen [5] and sulfur [6] (SII), and blue-green light emitted by oxygen [7] (OIII [8] ). Hues on the featured image [9] were then digitally reassigned to be indicative of their elemental [10] origins -- but also striking to the human eye [11] . The breathtaking composite was painstakingly composed [12] from hundreds of images which took nearly 200 hours to collect. Pictured, Barnard's Loop [13] , across the image bottom, appears to cradle interstellar constructs including the intricate Orion Nebula [14] seen just right of center. The Flame Nebula [15] can also be quickly located, but it takes a careful eye to identify the slight indentation of the dark Horsehead Nebula [16] . As to Orion's flashiness -- a leading explanation for the origin of Barnard's Loop [17] is a supernova blast [18] that occurred about two million years ago. Share the Sky: NASA Open API for APOD [19] Tomorrow's picture: giant eagle ------------------------------------------------------------------------------- < [20] | Archive [21] | Submissions [22] | Index [23] | Search [24] | Calendar [25] | RSS [26] | Education [27] | About APOD [28] | Discuss [29] | > [30] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [31] (MTU [32] ) & Jerry Bonnell [33] (UMCP [34] ) NASA Official: Phillip Newman Specific rights apply [35] . NASA Web Privacy Policy and Important Notices [36] A service of: ASD [37] at NASA [38] / GSFC [39] & Michigan Tech. U. [40] ---------- Site notes: [1] archivepix.html [2] image/1810/OrionRedBlue_Lindemann_1500.jpg [3] http://www.astrobin.com/users/dlindemann/ [4] ap101023.html [5] http://periodic.lanl.gov/1.shtml [6] http://periodic.lanl.gov/16.shtml [7] http://periodic.lanl.gov/8.shtml [8] https://en.wikipedia.org/wiki/Doubly_ionized_oxygen [9] http://www.astrobin.com/236167/C/ [10] http://genesismission.jpl.nasa.gov/educate/scimodule/cosmic/ptable.html [11] https://www.youtube.com/watch?v=yzyphSTkW2U [12] http://1.bp.blogspot.com/-9vG8d3-ge14/TkpGlZjif1I/AAAAAAAAAUk/TW7xS5SvY4w/ s1600/cat-puzzle-movement-flop.jpg [13] https://en.wikipedia.org/wiki/Barnard%27s_Loop [14] ap140325.html [15] ap141209.html [16] ap150513.html [17] http://adsabs.harvard.edu/abs/2011ApJ...733....9O [18] http://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/ what-is-a-supernova.html [19] https://api.nasa.gov/api.html#apod [20] ap181013.html [21] archivepix.html [22] lib/apsubmit2015.html [23] lib/aptree.html [24] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [25] calendar/allyears.html [26] /apod.rss [27] lib/edlinks.html [28] lib/about_apod.html [29] http://asterisk.apod.com/discuss_apod.php?date=181014 [30] ap181015.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] 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/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .