Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sat Dec 01 2018 07:48:33 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 December 1 [2] Mount Everest Star Trails Image Credit & Copyright [3] : Jeff Dai [4] (TWAN [5] ) Explanation: The highest [6] peak on planet Earth [7] is framed in this mountain and night skyscape. On September 30, the digital stack of 240 sequential exposures made with a camera fixed to a tripod at an Everest Base Camp [8] captured the sheer north face [9] of the Himalayan mountain and foreground illuminated by bright moonlight. Taken over 1.5 hours, the sequence also recorded colorful star trails. Reflecting the planet's daily rotation on its axis, their motion is along gentle concentric arcs centered on the south celestial pole [10] , a point well below the rugged horizon. The color [11] of the trails actually indicates the temperatures of the stars. Blueish hues are from hotter stars, and yellow to reddish hues are from stars cooler than the Sun. Tomorrow's picture: big star pillar ------------------------------------------------------------------------------- < [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/1812/EverestStarTrailsJeffDai.jpg [3] lib/about_apod.html#srapply [4] http://www.twanight.org/Dai [5] http://www.twanight.org/ [6] ap160225.html [7] https://www.earthobservatory.nasa.gov/ features/8000MeterPeaks [8] https://en.wikipedia.org/wiki/ Everest_Base_Camp [9] https://en.wikipedia.org/wiki/ Mount_Everest#North_ridge_route [10] ap120802.html [11] ap151224.html [12] ap181130.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=181201 [22] ap181202.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 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .