Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sat Feb 16 2019 07:24:55 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. 2019 February 16 [2] NGC 2359: Thor's Helmet Image Credit & Copyright [3] : Ignacio Diaz Bobillo [4] Explanation: NGC 2359 is a helmet-shaped cosmic cloud with wing-like appendages popularly called Thor's Helmet. Heroically sized even for a Norse god [5] , Thor's Helmet is about 30 light-years across. In fact, the helmet is more like an interstellar bubble [6] , blown as a fast wind from the bright, massive star near the bubble's center inflates a region within the surrounding molecular cloud. Known as a Wolf-Rayet star [7] , the central star is an extremely hot giant thought to be in a brief, pre-supernova [8] stage of evolution. NGC 2359 is located [9] about 15,000 light-years away in the constellation Canis Major [10] . The remarkably detailed image [11] is a mixed cocktail of data from broadband and narrowband filters that captures natural looking stars and the glow of the nebula's [12] filamentary structures. It highlights a blue-green color from strong emission due to oxygen [13] atoms in the glowing gas. Tomorrow's picture: shadow of a mechanical martian ------------------------------------------------------------------------------- < [14] | Archive [15] | Submissions [16] | Index [17] | Search [18] | Calendar [19] | RSS [20] | Education [21] | About APOD [22] | Discuss [23] | > [24] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [25] (MTU [26] ) & Jerry Bonnell [27] (UMCP [28] ) NASA Official: Phillip Newman Specific rights apply [29] . NASA Web Privacy Policy and Important Notices [30] A service of: ASD [31] at NASA [32] / GSFC [33] & Michigan Tech. U. [34] ---------- Site notes: [1] archivepix.html [2] image/1902/thor_LHORHGOBO_final.jpg [3] lib/about_apod.html#srapply [4] http://www.pampaskies.com/gallery3/index.php [5] https://en.wikipedia.org/wiki/Thor [6] ap131214.html [7] http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/ 980603a.html [8] ap050910.html [9] ap100319.html [10] http://www.internal.org/view_poem.phtml?poemID=115 [11] http://www.pampaskies.com/gallery3/ Deep-Space-Objects/TH_LHORHGOBO_final [12] http://iopscience.iop.org/1538-3881/118/2/948 [13] https://en.wikipedia.org/wiki/Nebulium [14] ap190215.html [15] archivepix.html [16] lib/apsubmit2015.html [17] lib/aptree.html [18] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [19] calendar/allyears.html [20] /apod.rss [21] lib/edlinks.html [22] lib/about_apod.html [23] http://asterisk.apod.com/discuss_apod.php?date=190216 [24] ap190217.html [25] http://www.phy.mtu.edu/faculty/Nemiroff.html [26] http://www.phy.mtu.edu/ [27] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [28] http://www.astro.umd.edu/ [29] lib/about_apod.html#srapply [30] https://www.nasa.gov/about/highlights/HP_Privacy.html [31] https://astrophysics.gsfc.nasa.gov/ [32] https://www.nasa.gov/ [33] https://www.nasa.gov/centers/goddard/ [34] http://www.mtu.edu/ --- Mystic BBS v1.12 A43 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .