Subj : Daily APOD Report To : All From : Ben Ritchey Date : Thu Mar 21 2019 08:02:59 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 21 [2] Star Trails and the Equinox Sunrise Image Credit & Copyright [3] : Juan Carlos Casado [4] (TWAN [5] , Earth and Stars [6] ) Acknowledgement: Andrea Rodriguez Anton [7] Explanation: Stars trail [8] and the Sun rises [9] in this night and day composite panorama made on March 19. The view looks toward the eastern horizon from La Nava de Santiago, Spain. To create it, a continuous series of digital frames was recorded for about two hours and combined to trace the concentric motion of the stars through the night sky. A reflection [10] of the Earth's rotation, star trails curve around the north celestial pole toward upper left and the south celestial pole toward the lower right. Of course [11] on that day the Sun [12] was near the celestial equator, a diagonal straight line in the wide-angle projection. A dense dimming filter was used to capture the Sun's image every two minutes. Superimposed on the star trails it rose due east in the morning sky. In the scene, foreground landscape and a local prehistoric monument [13] were illuminated by full moonlight, though [14] . The monument's corridor faces nearly to the east and the equinox sunrise. Tomorrow's picture: winter sky symphony ------------------------------------------------------------------------------- < [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/1903/lacara_equinocc19_jcc.jpg [3] lib/about_apod.html#srapply [4] http://www.twanight.org/casado [5] http://www.twanight.org [6] http://starryearth.com/ [7] https://astronomerswithoutborders.org/profile.html?id=7497 [8] ap190118.html [9] ap170705.html [10] ap070519.html [11] ap030923.htm [12] https://en.wikipedia.org/wiki/March_equinox [13] https://commons.wikimedia.org/wiki/ File:Dolmen_de_L%C3%A1cara_(6901631891).jpg [14] https://blogs.nasa.gov/Watch_the_Skies/2019/03/20/ here-comes-the-sun-and-moon/ [15] ap190320.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=190321 [25] ap190322.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 A43 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .