Subj : Daily APOD Report To : All From : Ben Ritchey Date : Tue Apr 23 2019 10:46:16 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. 2019 April 23 [2] Meteors, Comet, and Big Dipper over La Palma Image Credit & Copyright: Vincent Duparc [3] Explanation: Meteor showers are caused by streams of solid particles, dust size and larger, moving as a group through space. In most cases, the orbits of these meteor streams [4] can be identified with dust [5] expelled from a comet. When the Earth passes through a stream, the particles leave brilliant trails through the night sky as they disintegrate in Earth's atmosphere [6] . The meteor paths are all parallel [7] to each other, but, like train tracks [8] , the effect of perspective causes them to appear to originate from a radiant point [9] in the distance. The featured image composite was taken during January's Quadrantid meteor shower [10] from La Palma [11] , one of Spain [12] 's Canary Islands [13] , off the northwest coast of Africa [14] . The Quadrantids [15] radiant is visible just below the handle of the Big Dipper [16] . A careful eye [17] will also discern the faint green coma [18] of Comet Wirtanen [19] . Tonight is the peak of the modest Lyrid meteor shower [20] , with several meteors per hour visible from dark locations with clear skies. Tomorrow's picture: The Southern Crab ------------------------------------------------------------------------------- < [21] | Archive [22] | Submissions [23] | Index [24] | Search [25] | Calendar [26] | RSS [27] | Education [28] | About APOD [29] | Discuss [30] | > [31] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [32] (MTU [33] ) & Jerry Bonnell [34] (UMCP [35] ) NASA Official: Phillip Newman Specific rights apply [36] . NASA Web Privacy Policy and Important Notices [37] A service of: ASD [38] at NASA [39] / GSFC [40] & Michigan Tech. U. [41] ---------- Site notes: [1] archivepix.html [2] image/1904/Quadrantids_Duparc_1830.jpg [3] mailto: vmparc @a@t@ gmail .d.o.t. com [4] ap180808.html [5] ap011117.html [6] https://www.nasa.gov/sites/default/files/images/ 463940main_atmosphere-layers2_full.jpg [7] https://www.mathsisfun.com/definitions/parallel.html [8] http://en.es-static.us/upl/2010/12/ railroad-tracks-converge-shutterstock-e1367591337388.jpg [9] ap170427.html [10] https://en.wikipedia.org/wiki/Quadrantids [11] https://www.youtube.com/watch?v=Ub9622tvuUM [12] https://en.wikipedia.org/wiki/Spain [13] https://en.wikipedia.org/wiki/Canary_Islands [14] https://en.wikipedia.org/wiki/Africa [15] ap190109.html [16] ap171121.html [17] http://media.gettyimages.com/photos/ happy-funny-girl-with-magnifying-glass-picture-id467073331?s=170667a&w=1007 [18] ap170212.html [19] ap181216.html [20] https://en.wikipedia.org/wiki/Lyrids [21] ap190422.html [22] archivepix.html [23] lib/apsubmit2015.html [24] lib/aptree.html [25] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [26] calendar/allyears.html [27] /apod.rss [28] lib/edlinks.html [29] lib/about_apod.html [30] http://asterisk.apod.com/discuss_apod.php?date=190423 [31] ap190424.html [32] http://www.phy.mtu.edu/faculty/Nemiroff.html [33] http://www.phy.mtu.edu/ [34] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [35] http://www.astro.umd.edu/ [36] lib/about_apod.html#srapply [37] https://www.nasa.gov/about/highlights/HP_Privacy.html [38] https://astrophysics.gsfc.nasa.gov/ [39] https://www.nasa.gov/ [40] https://www.nasa.gov/centers/goddard/ [41] http://www.mtu.edu/ --- Mystic BBS v1.12 A43 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .