Subj : Daily APOD Report To : All From : Ben Ritchey Date : Wed Oct 10 2018 18:15:39 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 October 10 Sun Dance Video Credit: NASA [2] , SDO [3] ; Processing: Alan Watson via Helioviewer [4] Explanation: Sometimes, the surface of our Sun seems to dance. In the middle of 2012, for example, NASA's Sun-orbiting Solar Dynamic Observatory [5] spacecraft imaged an impressive prominence [6] that seemed to perform a running dive roll [7] like an acrobatic dancer. The dramatic explosion [8] was captured [9] in ultraviolet light [10] in the featured time-lapse video [11] covering about three hours. A looping magnetic field [12] directed the flow of hot plasma [13] on the Sun [14] . The scale of the dancing prominence [15] is huge -- the entire Earth [16] would easily fit under the flowing arch [17] of hot gas. A quiescent prominence typically [18] lasts about a month, and may erupt in a Coronal Mass Ejection [19] (CME) expelling hot gas [20] into the Solar System [21] . The energy mechanism that creates a solar prominence [22] is still a topic of research [23] . Unlike 2012, this year the Sun's surface is significantly more serene [24] , featuring fewer spinning prominences, as it is near the minimum [25] in its 11-year magnetic cycle [26] . Tomorrow's picture: launch and landing ------------------------------------------------------------------------------- < [27] | Archive [28] | Submissions [29] | Index [30] | Search [31] | Calendar [32] | RSS [33] | Education [34] | About APOD [35] | Discuss [36] | > [37] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [38] (MTU [39] ) & Jerry Bonnell [40] (UMCP [41] ) NASA Official: Phillip Newman Specific rights apply [42] . NASA Web Privacy Policy and Important Notices [43] A service of: ASD [44] at NASA [45] / GSFC [46] & Michigan Tech. U. [47] ---------- Site notes: [1] archivepix.html [2] https://www.nasa.gov/ [3] https://sdo.gsfc.nasa.gov/ [4] https://helioviewer.org/ [5] https://www.nasa.gov/mission_pages/sdo/main/index.html [6] ap030223.html [7] https://youtu.be/VzALZjoIx0g?t=225 [8] ap110307.html [9] http://cometal-comets.blogspot.com/2012/08/sdo-spinning-plasma.html?m=1 [10] https://science.nasa.gov/ems/10_ultravioletwaves [11] https://www.youtube.com/embed/hQFEHH5E69s [12] https://solarscience.msfc.nasa.gov/the_key.shtml [13] https://en.wikipedia.org/wiki/Plasma_(physics) [14] https://solarsystem.nasa.gov/solar-system/sun/in-depth/ [15] ap000809.html [16] ap121207.html [17] ap170429.html [18] http://solar.physics.montana.edu/YPOP/Program/hfilament.html [19] https://www.swpc.noaa.gov/phenomena/coronal-mass-ejections [20] ap010924.html [21] http://en.wikipedia.org/wiki/Sweden_Solar_System [22] ap030707.html [23] http://adsabs.harvard.edu/abs/2004ApJ...600.1043Z [24] ap180820.html [25] https://science.nasa.gov/science-news/news-articles/solar-minimum-is-coming [26] ap071203.html [27] ap181009.html [28] archivepix.html [29] lib/apsubmit2015.html [30] lib/aptree.html [31] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [32] calendar/allyears.html [33] /apod.rss [34] lib/edlinks.html [35] lib/about_apod.html [36] http://asterisk.apod.com/discuss_apod.php?date=181010 [37] ap181011.html [38] http://www.phy.mtu.edu/faculty/Nemiroff.html [39] http://www.phy.mtu.edu/ [40] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [41] http://www.astro.umd.edu/ [42] lib/about_apod.html#srapply [43] https://www.nasa.gov/about/highlights/HP_Privacy.html [44] https://astrophysics.gsfc.nasa.gov/ [45] https://www.nasa.gov/ [46] https://www.nasa.gov/centers/goddard/ [47] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .