Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sat Feb 23 2019 10:07:19 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 February 23 [2] The Stars of the Triangulum Galaxy Image Credit: NASA [3] , ESA [4] , M. Durbin, J. Dalcanton, and B. F. Williams (University of Washington [5] ) Explanation: Like grains of sand [6] on a cosmic beach, stars of the Triangulum Galaxy are resolved in this sharp mosaic from the Hubble Space Telescope's Advanced Camera for Surveys ( ACS [7] ). The inner region of the galaxy spanning over 17,000 light-years is covered at extreme resolution, the second largest image [8] ever released by Hubble. At its center is the bright, densely packed galactic core surrounded by a loose array of dark dust lanes mixed with the stars in the galactic plane. Also known as M33, the face-on spiral galaxy lies 3 million light-years away in the small northern constellation Triangulum. Over 50,000 light-years in diameter, the Triangulum Galaxy [9] is the third largest in the Local Group [10] of galaxies after the Andromeda Galaxy (M31), and our own Milky Way. Of course, to fully appreciate the Triangulum's stars, star clusters, and bright nebulae captured in this Hubble mosaic, you'll need to use a zoom tool [11] . Tomorrow's picture: light echoes ------------------------------------------------------------------------------- < [12] | Archive [13] | Submissions [14] | Index [15] | Search [16] | Calendar [17] | RSS [18] | Education [19] | About APOD [20] | Discuss [21] | > [22] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [23] (MTU [24] ) & Jerry Bonnell [25] (UMCP [26] ) NASA Official: Phillip Newman Specific rights apply [27] . NASA Web Privacy Policy and Important Notices [28] A service of: ASD [29] at NASA [30] / GSFC [31] & Michigan Tech. U. [32] ---------- Site notes: [1] archivepix.html [2] image/1902/heic1901aTriangulum.jpg [3] https://www.nasa.gov/ [4] http://www.esa.int/ESA [5] http://depts.washington.edu/astron/ [6] http://astronomy.swin.edu.au/staff/gmackie/billions.html [7] http://hubblesite.org/sci.d.tech/nuts_.and._bolts/ instruments/acs/ [8] https://spacetelescope.org/news/heic1901/ [9] ap180927.html [10] http://atlasoftheuniverse.com/localgr.html [11] https://www.spacetelescope.org/images/heic1901a/zoomable/ [12] ap190222.html [13] archivepix.html [14] lib/apsubmit2015.html [15] lib/aptree.html [16] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [17] calendar/allyears.html [18] /apod.rss [19] lib/edlinks.html [20] lib/about_apod.html [21] http://asterisk.apod.com/discuss_apod.php?date=190223 [22] ap190224.html [23] http://www.phy.mtu.edu/faculty/Nemiroff.html [24] http://www.phy.mtu.edu/ [25] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [26] http://www.astro.umd.edu/ [27] lib/about_apod.html#srapply [28] https://www.nasa.gov/about/highlights/HP_Privacy.html [29] https://astrophysics.gsfc.nasa.gov/ [30] https://www.nasa.gov/ [31] https://www.nasa.gov/centers/goddard/ [32] http://www.mtu.edu/ --- Mystic BBS v1.12 A43 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .