Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sun Sep 09 2018 10:58:09 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 September 9 [2] M1: The Crab Nebula from Hubble Image Credit: NASA [3] , ESA [4] , Hubble [5] , J. Hester, A. Loll (ASU [6] ) Explanation: This is the mess that is left when a star explodes. The Crab Nebula [7] , the result of a supernova [8] seen in 1054 AD [9] , is filled with mysterious [10] filaments. The filaments [11] are not only tremendously complex, but appear to have less mass than expelled [12] in the original supernova and a higher speed than expected [13] from a free explosion. The featured image [14] , taken by the Hubble Space Telescope [15] , is presented in three colors chosen for scientific interest [16] . The Crab Nebula [17] spans about 10 light-years [18] . In the nebula [19] 's very center lies a pulsar [20] : a neutron star [21] as massive as the Sun [22] but with only the size of a small town [23] . The Crab Pulsar [24] rotates about 30 times each second. Tomorrow's picture: a view on mars ------------------------------------------------------------------------------- < [25] | Archive [26] | Submissions [27] | Index [28] | Search [29] | Calendar [30] | RSS [31] | Education [32] | About APOD [33] | Discuss [34] | > [35] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [36] (MTU [37] ) & Jerry Bonnell [38] (UMCP [39] ) NASA Official: Phillip Newman Specific rights apply [40] . NASA Web Privacy Policy and Important Notices [41] A service of: ASD [42] at NASA [43] / GSFC [44] & Michigan Tech. U. [45] ---------- Site notes: [1] archivepix.html [2] image/1809/CrabNebula_Hubble_3864.jpg [3] https://www.nasa.gov/ [4] http://sci.esa.int/hubble/ [5] https://www.nasa.gov/mission_pages/hubble/story/index.html [6] http://sese.asu.edu/ [7] http://messier.seds.org/more/m001_h2.html [8] http://imagine.gsfc.nasa.gov/science/objects/supernovae1.html [9] http://messier.seds.org/more/m001_sn.html [10] http://www.youtube.com/watch?v=5VnJ9pRR8-8 [11] ap980208.html [12] http://adsabs.harvard.edu/abs/1995ApJ...454L.129F [13] http://adsabs.harvard.edu/abs/1998PASP..110..831N [14] https://www.spacetelescope.org/images/heic0515a/ [15] ap950810.html [16] http://s9.favim.com/orig/131225/cat-galaxy-glasses-Favim.com-1181244.jpg [17] http://en.wikipedia.org/wiki/Crab_Nebula [18] http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question19.html [19] https://www.youtube.com/watch?v=vPxLVgTIAbk [20] http://www.jb.man.ac.uk/~pulsar/Education/Sounds/sounds.html [21] http://www.astro.umd.edu/~miller/nstar.html [22] https://solarsystem.nasa.gov/solar-system/sun/in-depth/ [23] http://www.cityofhoughton.com/ [24] ap020920.html [25] ap180908.html [26] archivepix.html [27] lib/apsubmit2015.html [28] lib/aptree.html [29] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [30] calendar/allyears.html [31] /apod.rss [32] lib/edlinks.html [33] lib/about_apod.html [34] http://asterisk.apod.com/discuss_apod.php?date=180909 [35] ap180910.html [36] http://www.phy.mtu.edu/faculty/Nemiroff.html [37] http://www.phy.mtu.edu/ [38] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [39] http://www.astro.umd.edu/ [40] lib/about_apod.html#srapply [41] https://www.nasa.gov/about/highlights/HP_Privacy.html [42] https://astrophysics.gsfc.nasa.gov/ [43] https://www.nasa.gov/ [44] https://www.nasa.gov/centers/goddard/ [45] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .