Subj : Daily APOD Report To : All From : Ben Ritchey Date : Mon Mar 25 2019 10:22:33 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 March 25 [2] Arp 194: Merging Galaxy Group Image Credit: NASA [3] , ESA [4] , Hubble [5] ; Processing & License [6] : Judy Schmidt [7] Explanation: Why are stars forming in the bridge between these colliding galaxies? Usually when galaxies crash [8] , star formation is confined to galaxy disks or tidal tail [9] s. In Arp 194 [10] , though, there are bright knots of young stars right in a connecting bridge. Analyses of images and data including the featured image [11] of Arp 194 from Hubble [12] , as well as computer simulations [13] of the interaction, indicate that the bottom galaxy pass [14] ed right through the top galaxy within the past 100 million years. The result [15] has left a stream of gas that is now falling toward the bottom galaxy. Astronomers hypothesize [16] that stars form in this bridge because of [17] the recent fading of turbulence after the rapid collision. In about a billion years [18] , the galaxies -- including a smaller galaxy superposed on the upper galaxy (see it?) -- will all merge into one larger galaxy [19] . Tomorrow's picture: flaming star ------------------------------------------------------------------------------- < [20] | Archive [21] | Submissions [22] | Index [23] | Search [24] | Calendar [25] | RSS [26] | Education [27] | About APOD [28] | Discuss [29] | > [30] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [31] (MTU [32] ) & Jerry Bonnell [33] (UMCP [34] ) NASA Official: Phillip Newman Specific rights apply [35] . NASA Web Privacy Policy and Important Notices [36] A service of: ASD [37] at NASA [38] / GSFC [39] & Michigan Tech. U. [40] ---------- Site notes: [1] archivepix.html [2] image/1903/Arp194_HubbleSchmidt_1494.jpg [3] https://www.nasa.gov/ [4] http://www.esa.int/ [5] https://www.nasa.gov/mission_pages/hubble/main/index.html [6] https://creativecommons.org/licenses/by/2.0/ [7] http://geckzilla.com/ [8] ap150201.html [9] ap181211.html [10] http://hubblesite.org/video/615/news_release/2009-18 [11] https://www.flickr.com/photos/geckzilla/26654065358/in/dateposted/ [12] https://www.nasa.gov/mission_pages/hubble/story/index.html [13] ap130514.html [14] https://svs.gsfc.nasa.gov/11534 [15] http://adsabs.harvard.edu/abs/2003AJ....125.1897M [16] https://cdn140.picsart.com/244538806029212.png?r1024x1024 [17] http://adsabs.harvard.edu/abs/2016MNRAS.462.3419Z [18] http://www.chronozoom.com/#/t00000000-0000-0000-0000-000000000000@x=0 [19] ap120604.html [20] ap190324.html [21] archivepix.html [22] lib/apsubmit2015.html [23] lib/aptree.html [24] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [25] calendar/allyears.html [26] /apod.rss [27] lib/edlinks.html [28] lib/about_apod.html [29] http://asterisk.apod.com/discuss_apod.php?date=190325 [30] ap190326.html [31] http://www.phy.mtu.edu/faculty/Nemiroff.html [32] http://www.phy.mtu.edu/ [33] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [34] http://www.astro.umd.edu/ [35] lib/about_apod.html#srapply [36] https://www.nasa.gov/about/highlights/HP_Privacy.html [37] https://astrophysics.gsfc.nasa.gov/ [38] https://www.nasa.gov/ [39] https://www.nasa.gov/centers/goddard/ [40] http://www.mtu.edu/ --- Mystic BBS v1.12 A43 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .