Subj : Daily APOD Report To : All From : Ben Ritchey Date : Wed Dec 12 2018 07:40:14 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 December 12 [2] M43: Orion Falls Image Credit & Copyright: Zhuoqun Wu [3] , Chilescope Telescope 2 Explanation: Is there a waterfall in Orion? No, but some of the dust in M43 appears similar to a waterfall [4] on Earth. M43 [5] , part of the Orion Molecular Cloud [6] Complex [7] , is the often imaged but rarely mentioned neighbor of the more famous M42. M42 [8] , which includes many bright stars from the Trapezium cluster [9] , lies above the featured scene. M43 [10] is itself a star forming region and although laced with filaments of dark dust, is composed mostly of glowing hydrogen [11] . The entire Orion field [12] , located about 1600 light years [13] away, is inundated with many intricate and picturesque [14] filaments [15] of dust. Opaque to visible light, dark dust [16] is created [17] in the outer atmosphere of massive cool stars and expelled by a strong outer wind [18] of proton [19] s and electron [20] s. Free Download: 2019 APOD Calendar (v4 with light background) [21] Tomorrow's picture: Bennu 3D ------------------------------------------------------------------------------- < [22] | Archive [23] | Submissions [24] | Index [25] | Search [26] | Calendar [27] | RSS [28] | Education [29] | About APOD [30] | Discuss [31] | > [32] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [33] (MTU [34] ) & Jerry Bonnell [35] (UMCP [36] ) NASA Official: Phillip Newman Specific rights apply [37] . NASA Web Privacy Policy and Important Notices [38] A service of: ASD [39] at NASA [40] / GSFC [41] & Michigan Tech. U. [42] ---------- Site notes: [1] archivepix.html [2] image/1812/OrionFalls_Wu_1828.jpg [3] mailto: skywalkerww37 @at@ 163 .dot. com [4] https://youtu.be/wB6gHz8XHDI [5] http://www.sidleach.com/m43_1.jpg [6] ap101023.html [7] https://en.wikipedia.org/wiki/Orion_Molecular_Cloud_Complex [8] ap140408.html [9] ap180805.html [10] https://en.wikipedia.org/wiki/Messier_43 [11] https://periodic.lanl.gov/1.shtml [12] https://youtu.be/5k7iRQ1RUr8 [13] https://spaceplace.nasa.gov/light-year/en/ [14] ap180423.html [15] ap170308.html [16] ap030706.html [17] https://en.wikipedia.org/wiki/Cosmic_dust#Dust_grain_formation [18] http://astronomy.swin.edu.au/cosmos/s/stellar+winds [19] https://en.wikipedia.org/wiki/Proton [20] https://www-spof.gsfc.nasa.gov/Education/whelect.html [21] https://apod.nasa.gov/apod/image/1812/ApodCalendar2019v4_Dave.pdf [22] ap181211.html [23] archivepix.html [24] lib/apsubmit2015.html [25] lib/aptree.html [26] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [27] calendar/allyears.html [28] /apod.rss [29] lib/edlinks.html [30] lib/about_apod.html [31] http://asterisk.apod.com/discuss_apod.php?date=181212 [32] ap181213.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] 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] http://www.mtu.edu/ --- Mystic BBS v1.12 A40 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .