Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sun Aug 26 2018 09:12:22 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 August 26 [2] Fire on Earth Image Credit: John McColgan (AFS [3] , BLM [4] ) Explanation: Sometimes, regions of planet Earth light up with fire. Since fire [5] is the rapid acquisition of oxygen, and since oxygen [6] is a key indicator of life, fire [7] on any planet would be an indicator of life [8] on that planet. Most of the Earth's land has been scorched by fire [9] at some time in the past. Although causing many a tragedy, for many places on Earth fire [10] is considered part of a natural ecosystem cycle [11] . Large forest fires [12] on Earth [13] are usually caused either by humans [14] or lightning [15] and can be visible from orbit [16] . Featured [17] from the year 2000, stunned elk [18] avoid a fire [19] sweeping through Montana [20] 's Bitterroot Valley [21] by standing in a river. Tomorrow's picture: sun dark ------------------------------------------------------------------------------- < [22] | Archive [23] | Submissions [24] | Index [25] | Search [26] | Calendar [27] | RSS [28] | Education [29] | About APOD [30] | Discuss [31] | > [32] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [33] (MTU [34] ) & Jerry Bonnell [35] (UMCP [36] ) NASA Official: Phillip Newman Specific rights apply [37] . NASA Web Privacy Policy and Important Notices [38] A service of: ASD [39] at NASA [40] / GSFC [41] & Michigan Tech. U. [42] ---------- Site notes: [1] archivepix.html [2] image/1808/fires_mccolgan_1731.jpg [3] http://fire.ak.blm.gov/ [4] http://www.blm.gov/ [5] http://en.wikipedia.org/wiki/Fire [6] http://periodic.lanl.gov/8.shtml [7] http://www.youtube.com/watch?v=1pfqIcSydgE [8] http://www.newscientist.com/article/ dn23193-huge-telescopes-could-spy-alien-oxygen.html [9] https://fsapps.nwcg.gov/ [10] ap130829.html [11] http://en.wikipedia.org/wiki/Fire_ecology [12] http://www.arborday.org/replanting/firecauses.cfm [13] https://solarsystem.nasa.gov/planets/earth/overview/ [14] https://www.nps.gov/articles/wildfire-causes-and-evaluations.htm [15] ap161205.html [16] ap170515.html [17] https://www.thoughtco.com/most-famous-wildfire-photograph-ever-taken-1342839 [18] https://naturalhistory.si.edu/mna/image_info.cfm?species_id=33 [19] ap080709.html [20] http://en.wikipedia.org/wiki/Montana [21] https://www.youtube.com/watch?v=8Wkvvsrra4o [22] ap180825.html [23] archivepix.html [24] lib/apsubmit2015.html [25] lib/aptree.html [26] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [27] calendar/allyears.html [28] /apod.rss [29] lib/edlinks.html [30] lib/about_apod.html [31] http://asterisk.apod.com/discuss_apod.php?date=180826 [32] ap180827.html [33] http://www.phy.mtu.edu/faculty/Nemiroff.html [34] http://www.phy.mtu.edu/ [35] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [36] http://www.astro.umd.edu/ [37] lib/about_apod.html#srapply [38] https://www.nasa.gov/about/highlights/HP_Privacy.html [39] https://astrophysics.gsfc.nasa.gov/ [40] https://www.nasa.gov/ [41] https://www.nasa.gov/centers/goddard/ [42] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .