Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sun Sep 30 2018 09:37:03 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 30 [2] The Lonely Neutron Star in Supernova Remnant E0102-72.3 Credit: X-ray (NASA [3] / CXC [4] / ESO [5] / F. Vogt et al. [6] ); Optical (ESO [7] / VLT [8] / MUSE [9] & NASA [10] / STScI [11] ) Explanation: Why is this neutron star off-center? Recently a lone neutron star has been found within the debris [12] left over from an old supernova explosion [13] . The "lonely neutron star" in question is the blue dot at the center of the red nebula near the bottom left of E0102-72.3 [14] . In the featured image composite [15] , blue represents X-ray light captured by NASA's Chandra Observatory [16] , while red and green represent optical light captured by ESO [17] 's Very Large Telescope [18] in Chile [19] and NASA's Hubble Space Telescope [20] in orbit. The displaced position of this neutron star [21] is unexpected since the dense star is thought to be the core of the star that exploded in the supernova and created the outer nebula [22] . It could be that the neutron star in E0102 [23] was pushed away from the nebula's center by the supernova itself, but then it seems odd that the smaller red ring remains centered on the neutron star [24] . Alternatively, the outer nebula [25] could have been expelled during a different scenario -- perhaps even involving another star [26] . Future observations of the nebulas and neutron star [27] appear likely to resolve the situation. Tomorrow's picture: NASA's 60th ------------------------------------------------------------------------------- < [28] | Archive [29] | Submissions [30] | Index [31] | Search [32] | Calendar [33] | RSS [34] | Education [35] | About APOD [36] | Discuss [37] | > [38] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [39] (MTU [40] ) & Jerry Bonnell [41] (UMCP [42] ) NASA Official: Phillip Newman Specific rights apply [43] . NASA Web Privacy Policy and Important Notices [44] A service of: ASD [45] at NASA [46] / GSFC [47] & Michigan Tech. U. [48] ---------- Site notes: [1] archivepix.html [2] image/1809/E0102NS_HubbleChandra_3985.jpg [3] https://www.nasa.gov/ [4] http://chandra.harvard.edu/ [5] https://www.eso.org/ [6] https://arxiv.org/abs/1803.01006 [7] https://www.eso.org/ [8] https://www.eso.org/public/usa/teles-instr/paranal-observatory/vlt/ [9] https://www.eso.org/sci/facilities/develop/instruments/muse.html [10] https://www.nasa.gov/ [11] http://www.stsci.edu/ [12] https://arxiv.org/abs/1803.01006 [13] https://www.spacetelescope.org/videos/heic0515a/ [14] ap090905.html [15] http://chandra.harvard.edu/photo/2018/e0102/ [16] http://chandra.harvard.edu/about/ [17] https://www.eso.org/public/about-eso/ [18] ap000707.html [19] https://en.wikipedia.org/wiki/Chile [20] https://www.nasa.gov/mission_pages/hubble/story/index.html [21] https://en.wikipedia.org/wiki/Neutron_star [22] ap000414.html [23] https://www.youtube.com/watch?v=uzF1zQ-4vwo [24] ap170501.html [25] ap991209.html [26] ap991219.html [27] http://chandra.harvard.edu/photo/2018/e0102/e0102_BU.mp4 [28] ap180929.html [29] archivepix.html [30] lib/apsubmit2015.html [31] lib/aptree.html [32] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [33] calendar/allyears.html [34] /apod.rss [35] lib/edlinks.html [36] lib/about_apod.html [37] http://asterisk.apod.com/discuss_apod.php?date=180930 [38] ap181001.html [39] http://www.phy.mtu.edu/faculty/Nemiroff.html [40] http://www.phy.mtu.edu/ [41] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [42] http://www.astro.umd.edu/ [43] lib/about_apod.html#srapply [44] https://www.nasa.gov/about/highlights/HP_Privacy.html [45] https://astrophysics.gsfc.nasa.gov/ [46] https://www.nasa.gov/ [47] https://www.nasa.gov/centers/goddard/ [48] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .