Subj : Daily APOD Report To : All From : Ben Ritchey Date : Thu Sep 27 2018 10:40:25 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 September 27 [2] M33: Triangulum Galaxy Image Credit & Copyright [3] : Christoph Kaltseis [4] , CEDIC [5] Explanation: The small, northern constellation Triangulum [6] harbors this magnificent face-on spiral galaxy, M33. Its popular names include the Pinwheel Galaxy or just the Triangulum Galaxy [7] . M33 is over 50,000 light-years in diameter, third largest in the Local Group [8] of galaxies after the Andromeda Galaxy (M31), and our own Milky Way. About 3 million light-years from the Milky Way, M33 is itself thought to be a satellite of the Andromeda Galaxy and astronomers [9] in these two galaxies would likely have spectacular views of each other's grand spiral star systems. As for [10] the view from planet Earth, this sharp image [11] shows off M33's blue star clusters and pinkish star forming [12] regions along the galaxy's loosely wound spiral arms. In fact, the cavernous NGC 604 [13] is the brightest star forming region, seen here at about the 7 o'clock position from the galaxy center. Like M31, M33's population of well-measured variable stars have helped make this nearby spiral a cosmic yardstick for establishing [14] the distance scale [15] of the Universe. Tomorrow's picture: pixels in space ------------------------------------------------------------------------------- < [16] | Archive [17] | Submissions [18] | Index [19] | Search [20] | Calendar [21] | RSS [22] | Education [23] | About APOD [24] | Discuss [25] | > [26] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [27] (MTU [28] ) & Jerry Bonnell [29] (UMCP [30] ) NASA Official: Phillip Newman Specific rights apply [31] . NASA Web Privacy Policy and Important Notices [32] A service of: ASD [33] at NASA [34] / GSFC [35] & Michigan Tech. U. [36] ---------- Site notes: [1] archivepix.html [2] image/1809/M33_15x480s_CDK14_D810A_ps13-ap.jpg [3] lib/about_apod.html#srapply [4] http://www.christoph-kaltseis.com/ [5] http://www.cedic.at/en/cedic.php [6] http://www.hawastsoc.org/deepsky/tri/index.html [7] http://messier.seds.org/m/m033.html [8] http://atlasoftheuniverse.com/localgr.html [9] http://arxiv.org/abs/astro-ph?papernum=0506609 [10] ap130926.html [11] http://www.cedic.at/apfr/ [12] ap091017.html [13] http://hubblesite.org/newscenter/archive/releases/ 2003/30/ [14] http://adsabs.harvard.edu/cgi-bin/ bib_query?1926ApJ....63..236H [15] http://antwrp.gsfc.nasa.gov/diamond_jubilee/ debate96.html [16] ap180926.html [17] archivepix.html [18] lib/apsubmit2015.html [19] lib/aptree.html [20] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [21] calendar/allyears.html [22] /apod.rss [23] lib/edlinks.html [24] lib/about_apod.html [25] http://asterisk.apod.com/discuss_apod.php?date=180927 [26] ap180928.html [27] http://www.phy.mtu.edu/faculty/Nemiroff.html [28] http://www.phy.mtu.edu/ [29] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [30] http://www.astro.umd.edu/ [31] lib/about_apod.html#srapply [32] https://www.nasa.gov/about/highlights/HP_Privacy.html [33] https://astrophysics.gsfc.nasa.gov/ [34] https://www.nasa.gov/ [35] https://www.nasa.gov/centers/goddard/ [36] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .