Subj : Daily APOD Report To : All From : Ben Ritchey Date : Fri Mar 15 2019 05:53:13 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 March 15 [2] A View Toward M101 Image Credit & Copyright [3] : Christoph Kaltseis [4] , CEDIC 2019 [5] Explanation: Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier's [6] famous catalog, but definitely not one of the least [7] .. About 170,000 light-years across, this galaxy is enormous, almost twice the size of our own Milky Way galaxy. M101 was also one of the original spiral nebulae [8] observed by Lord Rosse's large 19th century telescope, the Leviathan [9] of Parsontown. M101 shares [10] this modern telescopic field of view with more distant background galaxies, foreground stars within the Milky Way, and a companion dwarf galaxy NGC 5474 [11] (lower right). The colors of the Milky Way [12] stars can also be found in the starlight from the large island universe. Its core is dominated by light from cool yellowish stars. Along [13] its grand design spiral arms are the blue colors of hotter, young stars mixed with obscuring dust lanes and pinkish star forming regions. Also known as the Pinwheel Galaxy, M101 [14] lies within the boundaries of the northern constellation Ursa Major, about 23 million light-years away [15] . Its companion NGC 5474 has likely been distorted by its past gravitational interactions with the dominant M101. Tomorrow's picture: southern sky view ------------------------------------------------------------------------------- < [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/1903/M101n8_4tp_Kaltseis.jpg [3] lib/about_apod.html#srapply [4] http://www.cedic.at/en/cedic_slt.php [5] http://www.cedic.at/en/cedic.php [6] ap000311.html [7] http://www.messier.seds.org/m/m102d.html [8] http://www.messier.seds.org/more/m101_rosse.html [9] https://en.wikipedia.org/wiki/Leviathan_of_Parsonstown [10] https://blog.naver.com/omololee/221260541583 [11] http://www.spacetelescope.org/images/potw1424a/ [12] https://en.wikipedia.org/wiki/Galaxy#Milky_Way [13] https://arxiv.org/abs/1608.00969 [14] http://www.messier.seds.org/m/m101.html [15] http://hubblesite.org/video/517/news_release/2006-10 [16] ap190314.html [17] archivepix.html [18] lib/apsubmit2015.html [19] lib/aptree.html [20] http://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=190315 [26] ap190316.html [27] http://www.phy.mtu.edu/faculty/Nemiroff.html [28] http://www.phy.mtu.edu/ [29] http://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [30] http://www.astro.umd.edu/ [31] lib/about_apod.html#srapply [32] http://www.nasa.gov/about/highlights/HP_Privacy.html [33] http://astrophysics.gsfc.nasa.gov/ [34] http://www.nasa.gov/ [35] http://www.nasa.gov/centers/goddard/ [36] http://www.mtu.edu/ --- Mystic BBS v1.12 A43 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .