Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sun Sep 16 2018 08:37 am 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 16 [2] A Solar Filament Erupts Image Credit: NASA [3] 's GSFC [4] , SDO AIA Team [5] Explanation: What's happened to our Sun? Nothing very unusual -- it just threw a filament [6] . Toward the middle of 2012, a long standing solar filament [7] suddenly erupted into space producing an energetic Coronal Mass Ejection (CME). The filament [8] had been held up for days by the Sun's ever changing magnetic field [9] and the timing of the eruption was unexpected. Watched closely [10] by the Sun-orbiting Solar Dynamics Observatory, the resulting explosion [11] shot [12] electrons and ions into the Solar System, some of which arrived at Earth three days later and impacted Earth's magnetosphere [13] , causing visible aurorae [14] . Loops of plasma surrounding an active region [15] can be seen above the erupting filament in the featured [16] ultraviolet [17] image. Although the Sun is now in a relatively inactive [18] state of its 11-year cycle [19] , unexpected holes [20] have opened in the Sun's corona [21] allowing an excess of charged particles [22] to stream into space. As before, these charged particles are creating auroras [23] . Tomorrow's picture: black hole necklace ------------------------------------------------------------------------------- < [24] | Archive [25] | Submissions [26] | Index [27] | Search [28] | Calendar [29] | RSS [30] | Education [31] | About APOD [32] | Discuss [33] | > [34] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [35] (MTU [36] ) & Jerry Bonnell [37] (UMCP [38] ) NASA Official: Phillip Newman Specific rights apply [39] . NASA Web Privacy Policy and Important Notices [40] A service of: ASD [41] at NASA [42] / GSFC [43] & Michigan Tech. U. [44] ---------- Site notes: [1] archivepix.html [2] image/1809/filament_sdo_1080.jpg [3] https://www.nasa.gov/ [4] https://www.nasa.gov/goddard [5] https://sdo.gsfc.nasa.gov/ [6] ap101215.html [7] http://solar.physics.montana.edu/ypop/Program/hfilament.html [8] http://blogs.discovermagazine.com/badastronomy/2012/09/10/ a-huge-solar-filament-erupts-into-space/ [9] http://solar-center.stanford.edu/magnetism/magneticfields.html [10] http://www.flickr.com/photos/gsfc/sets/72157631408160534/ [11] http://www.flickr.com/photos/gsfc/7931868316/in/set-72157631408160534 [12] http://www.flickr.com/photos/gsfc/7938936660/in/set-72157631408160534 [13] http://en.wikipedia.org/wiki/Magnetosphere [14] ap120321.html [15] ap080924.html [16] http://www.flickr.com/photos/gsfc/7931831962/in/set-72157631408160534/ [17] https://science.nasa.gov/ems/10_ultravioletwaves [18] https://science.nasa.gov/science-news/news-articles/solar-minimum-is-coming [19] https://en.wikipedia.org/wiki/Solar_cycle [20] https://en.wikipedia.org/wiki/Coronal_hole [21] ap180430.html [22] https://en.wikipedia.org/wiki/Charged_particle [23] http://spaceweathergallery.com/aurora_gallery.html [24] ap180915.html [25] archivepix.html [26] lib/apsubmit2015.html [27] lib/aptree.html [28] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [29] calendar/allyears.html [30] /apod.rss [31] lib/edlinks.html [32] lib/about_apod.html [33] http://asterisk.apod.com/discuss_apod.php?date=180916 [34] ap180917.html [35] http://www.phy.mtu.edu/faculty/Nemiroff.html [36] http://www.phy.mtu.edu/ [37] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [38] http://www.astro.umd.edu/ [39] lib/about_apod.html#srapply [40] https://www.nasa.gov/about/highlights/HP_Privacy.html [41] https://astrophysics.gsfc.nasa.gov/ [42] https://www.nasa.gov/ [43] https://www.nasa.gov/centers/goddard/ [44] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .