Subj : Daily APOD Report To : All From : Ben Ritchey Date : Fri Nov 02 2018 10:51:31 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 November 2 [2] Cygnus Shell Supernova Remnant W63 Image Credit & Copyright [3] : J-P Metsavainio (Astro Anarchy [4] ) Explanation: The ghost of a long-dead star [5] , the W63 supernova remnant shines like a faint cosmic smoke-ring along the plane of the Milky Way galaxy toward the northern constellation Cygnus [6] the swan. Its wraithlike appearance is traced against the region's [7] rich complex of interstellar clouds and dust by an eerie blue glow. Spanning over four full moons on the sky, the beautiful image [8] is a telescopic mosaic in twelve panels that combines 100 hours of exposure time using narrow band filters. It shows characteristic light from ionized atoms of sulfur, hydrogen and oxygen in red, green, and blue hues. Likely over 5,000 light-years away, the visible part of the still expanding [9] shell supernova remnant is around 150 light-years in diameter. So far no source has been identified as with the remains [10] of W63's original star. Light from the star's supernova explosion [11] would have reached Earth over 15,000 years ago [12] . Tomorrow's picture: shadow play ------------------------------------------------------------------------------- < [13] | Archive [14] | Submissions [15] | Index [16] | Search [17] | Calendar [18] | RSS [19] | Education [20] | About APOD [21] | Discuss [22] | > [23] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [24] (MTU [25] ) & Jerry Bonnell [26] (UMCP [27] ) NASA Official: Phillip Newman Specific rights apply [28] . NASA Web Privacy Policy and Important Notices [29] A service of: ASD [30] at NASA [31] / GSFC [32] & Michigan Tech. U. [33] ---------- Site notes: [1] archivepix.html [2] image/1811/CygnusSupernovaremnantW63.jpg [3] lib/about_apod.html#srapply [4] http://www.astroanarchy.blogspot.com/ [5] https://www.nasa.gov/feature/jpl/ the-fading-ghost-of-a-long-dead-star [6] ap070920.html [7] http://aspmonographs.org/a/volumes/ article_details?paper_id=3 [8] https://astroanarchy.blogspot.com/2018/10/ a-very-rare-photo-cygnus-shell.html [9] https://arxiv.org/abs/astro-ph/0311530 [10] http://chandra.harvard.edu/photo/2018/kes75/ [11] http://chandra.harvard.edu/xray_sources/supernovas.html [12] https://ui.adsabs.harvard.edu/?#abs/1977A%26A....55...11A [13] ap181101.html [14] archivepix.html [15] lib/apsubmit2015.html [16] lib/aptree.html [17] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [18] calendar/allyears.html [19] /apod.rss [20] lib/edlinks.html [21] lib/about_apod.html [22] http://asterisk.apod.com/discuss_apod.php?date=181102 [23] ap181103.html [24] http://www.phy.mtu.edu/faculty/Nemiroff.html [25] http://www.phy.mtu.edu/ [26] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [27] http://www.astro.umd.edu/ [28] lib/about_apod.html#srapply [29] https://www.nasa.gov/about/highlights/HP_Privacy.html [30] https://astrophysics.gsfc.nasa.gov/ [31] https://www.nasa.gov/ [32] https://www.nasa.gov/centers/goddard/ [33] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .