Subj : Daily APOD Report To : All From : Ben Ritchey Date : Fri Jan 18 2019 19:34:31 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 January 18 [2] Circumpolar Star Trails Image Credit & Copyright [3] : Gabriel Funes [4] Explanation: As Earth [5] spins on its axis, the stars appear to rotate around an observatory in this well-composed image from the Canary Island of Tenerife. Of course, the colorful concentric arcs traced out by the stars are really centered on the planet's North Celestial Pole. Convenient [6] for northern hemisphere astro-imagers and celestial navigators alike, bright star Polaris is near [7] the pole and positioned in this scene to be behind the telescope dome. Made with [8] a camera fixed to a tripod, the series of over 200 stacked digital exposures spanned about 4 hours. The observatory was not operating on that clear, dark night, but that's not surprising. The dome houses the Teide Observatory's large THEMIS Solar Telescope [9] . Tomorrow's picture: light-weekend ------------------------------------------------------------------------------- < [10] | Archive [11] | Submissions [12] | Index [13] | Search [14] | Calendar [15] | RSS [16] | Education [17] | About APOD [18] | Discuss [19] | > [20] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [21] (MTU [22] ) & Jerry Bonnell [23] (UMCP [24] ) NASA Official: Phillip Newman Specific rights apply [25] . NASA Web Privacy Policy and Important Notices [26] A service of: ASD [27] at NASA [28] / GSFC [29] & Michigan Tech. U. [30] ---------- Site notes: [1] archivepix.html [2] image/1901/Startrail_Funes.jpg [3] lib/about_apod.html#srapply [4] mailto: gfunpol [at] gmail [dot] com [5] https://www.nasa.gov/image-feature/ star-trails-seen-from-low-earth-orbit [6] ap131023.html [7] ap110514.html [8] ap070519.html [9] http://www.iac.es/eno.php?op1=3&op2=6&id=2&lang=en [10] ap190117.html [11] archivepix.html [12] lib/apsubmit2015.html [13] lib/aptree.html [14] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [15] calendar/allyears.html [16] /apod.rss [17] lib/edlinks.html [18] lib/about_apod.html [19] http://asterisk.apod.com/discuss_apod.php?date=190118 [20] ap190119.html [21] http://www.phy.mtu.edu/faculty/Nemiroff.html [22] http://www.phy.mtu.edu/ [23] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [24] http://www.astro.umd.edu/ [25] lib/about_apod.html#srapply [26] https://www.nasa.gov/about/highlights/HP_Privacy.html [27] https://astrophysics.gsfc.nasa.gov/ [28] https://www.nasa.gov/ [29] https://www.nasa.gov/centers/goddard/ [30] http://www.mtu.edu/ --- Mystic BBS v1.12 A42 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .