Subj : Daily APOD Report To : All From : Ben Ritchey Date : Wed Dec 19 2018 09:09:35 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 December 19 [2] A Rainbow Geminid Meteor Image Credit & Copyright: Dean Rowe [3] Explanation: Meteors can be colorful. While the human eye [4] usually cannot discern many colors, cameras often can. Pictured is a Geminid [5] captured by camera during last week's meteor shower [6] that was not only impressively bright, but colorful. The radiant grit [7] cast off by asteroid 3200 Phaethon [8] blazed a path across Earth's atmosphere [9] longer than 60 times the angular diameter of the Moon. Colors in meteors [10] usually originate from ionized elements released as the meteor [11] disintegrates, with blue-green typically originating from magnesium [12] , calcium [13] radiating violet, and nickel [14] glowing green. Red, however, typically originates from energized nitrogen [15] and oxygen [16] in the Earth's atmosphere. This bright meteor [17] ic fireball [18] was gone in a flash -- less than a second -- but it left a wind-blown ionization trail [19] that remained visible [20] for several minutes, the start of which can be seen [21] here. Gallery: Geminid Meteors 2018 [22] Tomorrow's picture: seven sisters and a comet ------------------------------------------------------------------------------- < [23] | Archive [24] | Submissions [25] | Index [26] | Search [27] | Calendar [28] | RSS [29] | Education [30] | About APOD [31] | Discuss [32] | > [33] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [34] (MTU [35] ) & Jerry Bonnell [36] (UMCP [37] ) NASA Official: Phillip Newman Specific rights apply [38] . NASA Web Privacy Policy and Important Notices [39] A service of: ASD [40] at NASA [41] / GSFC [42] & Michigan Tech. U. [43] ---------- Site notes: [1] archivepix.html [2] image/1812/GeminidColors_Rowe_2048.jpg [3] https://photos.deanrowe.net/ [4] https://medium.com/photography-secrets/ whats-the-difference-between-a-camera-and-a-human-eye-a006a795b09f [5] ap131223.html [6] https://earthsky.org/astronomy-essentials/ everything-you-need-to-know-geminid-meteor-shower [7] https://upload.wikimedia.org/wikipedia/commons/6/63/ Meteoroid_meteor_meteorite.gif [8] https://en.wikipedia.org/wiki/3200_Phaethon [9] https://scied.ucar.edu/shortcontent/earths-atmosphere [10] https://www.amsmeteors.org/fireballs/faqf/#5 [11] https://en.wikipedia.org/wiki/Meteoroid#Meteor [12] https://youtu.be/wqErrNvns4o [13] https://periodic.lanl.gov/20.shtml [14] https://en.wikipedia.org/wiki/Nickel [15] https://youtu.be/0kMqRhJ_A0c [16] https://youtu.be/qERdL8uHSgI [17] https://solarsystem.nasa.gov/asteroids-comets-and-meteors/ meteors-and-meteorites/in-depth/ [18] https://www.amsmeteors.org/fireballs/faqf/ [19] https://youtu.be/KJpQTL6V_WI [20] ap180817.html [21] https://previews.123rf.com/images/oksun70/oksun701208/oksun70120800077/ 14849477-charming-cat-kitten-looking-up.jpg [22] https://www.facebook.com/pg/APOD.Sky/photos/ ?tab=album&album_id=1700269136743965 [23] ap181218.html [24] archivepix.html [25] lib/apsubmit2015.html [26] lib/aptree.html [27] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [28] calendar/allyears.html [29] /apod.rss [30] lib/edlinks.html [31] lib/about_apod.html [32] http://asterisk.apod.com/discuss_apod.php?date=181219 [33] ap181220.html [34] http://www.phy.mtu.edu/faculty/Nemiroff.html [35] http://www.phy.mtu.edu/ [36] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [37] http://www.astro.umd.edu/ [38] lib/about_apod.html#srapply [39] https://www.nasa.gov/about/highlights/HP_Privacy.html [40] https://astrophysics.gsfc.nasa.gov/ [41] https://www.nasa.gov/ [42] https://www.nasa.gov/centers/goddard/ [43] http://www.mtu.edu/ --- Mystic BBS v1.12 A40 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .