Subj : Daily APOD Report To : All From : Ben Ritchey Date : Fri Jan 25 2019 02:32:13 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 January 25 [2] Moon Struck Image Credit & Copyright [3] : Petr Horalek [4] Explanation: Craters [5] produced by ancient impacts on the airless Moon have long been a familiar sight. But only since the 1990s have observers began to regularly record and study optical flashes on the lunar surface [6] , likely explosions resulting from impacting meteoroids. Of course [7] , the flashes are difficult to see against a bright, sunlit lunar surface. But during the January 21 total eclipse many imagers [8] serendipitously [9] captured a meteoroid impact flash [10] against the dim red Moon. Found while examining [11] images taken shortly before the total eclipse phase began, the flash is indicated in the inset above, near the Moon's darkened western limb [12] . Estimates based on the flash duration [13] recorded by the Moon Impact Detection and Analysis System ( MIDAS [14] ) telescopes in southern Spain indicate the impactor's mass was about 10 kilograms and created a crater between seven and ten meters in diameter. Tomorrow's picture: shadow-weekend ------------------------------------------------------------------------------- < [15] | Archive [16] | Submissions [17] | Index [18] | Search [19] | Calendar [20] | RSS [21] | Education [22] | About APOD [23] | Discuss [24] | > [25] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [26] (MTU [27] ) & Jerry Bonnell [28] (UMCP [29] ) NASA Official: Phillip Newman Specific rights apply [30] . NASA Web Privacy Policy and Important Notices [31] A service of: ASD [32] at NASA [33] / GSFC [34] & Michigan Tech. U. [35] ---------- Site notes: [1] archivepix.html [2] image/1901/2019_01_21_ZM_Single_crop.jpg [3] lib/about_apod.html#srapply [4] http://www.astronom.cz/horalek/?page_id=20 [5] ap011208.html [6] https://www.skyandtelescope.com/astronomy-news/ new-high-end-search-for-lunar-impacts/ [7] http://spaceweather.com/ archive.php?view=1&day=23&month=01&year=2019 [8] http://spaceweathergallery.com/eclipse_gallery.html [9] https://twitter.com/willgater/status/ 1087478475919900672 [10] https://science.nasa.gov/science-news/science-at-nasa/ 2013/16may_lunarimpact/ [11] http://www.astronom.cz/horalek/?p=4458 [12] https://www.scientificamerican.com/article/ in-a-first-earthlings-spot-a-meteor-strike-the-eclipse-darkened-moon/ [13] https://www.youtube.com/watch?v=wnf5rHypPSo [14] https://www.youtube.com/watch?v=FNvfBCu-jjI [15] ap190124.html [16] archivepix.html [17] lib/apsubmit2015.html [18] lib/aptree.html [19] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [20] calendar/allyears.html [21] /apod.rss [22] lib/edlinks.html [23] lib/about_apod.html [24] http://asterisk.apod.com/discuss_apod.php?date=190125 [25] ap190126.html [26] http://www.phy.mtu.edu/faculty/Nemiroff.html [27] http://www.phy.mtu.edu/ [28] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [29] http://www.astro.umd.edu/ [30] lib/about_apod.html#srapply [31] https://www.nasa.gov/about/highlights/HP_Privacy.html [32] https://astrophysics.gsfc.nasa.gov/ [33] https://www.nasa.gov/ [34] https://www.nasa.gov/centers/goddard/ [35] http://www.mtu.edu/ --- Mystic BBS v1.12 A42 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .