Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sat Dec 08 2018 10:18:53 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 8 Tiny Planet Timelapse Video Credit & Copyright [2] : Brian Haidet [3] - Music Credit: Space Walk - Silent Partner [4] Explanation: You can pack a lot of sky watching into 30 seconds on this tiny planet. Of course, the full spherical image timelapse video was recorded [5] on planet Earth [6] , from Grande Pines Observatory [7] outside Pinehurst, North Carolina. It was shot in early September with a single camera and circular fisheye lens, digitally combining one 24-hour period with camera and lens pointed up with one taken with camera and lens pointed down. The resulting image data is processed and projected onto a flat frame centered on the nadir [8] , the point directly below the camera. Watch as clouds pass, shadows creep, and the sky cycles from day to night when stars swirl around the horizon. Keep watching, though. In a second sequence the projected center is the south celestial pole [9] , planet Earth's axis of rotation below the tiny planet horizon. Holding the stars fixed, the horizon itself rotates as the tiny planet swings around the frame, hiding half the sky through day and night [10] . Tomorrow's picture: sky dance ------------------------------------------------------------------------------- < [11] | Archive [12] | Submissions [13] | Index [14] | Search [15] | Calendar [16] | RSS [17] | Education [18] | About APOD [19] | Discuss [20] | > [21] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [22] (MTU [23] ) & Jerry Bonnell [24] (UMCP [25] ) NASA Official: Phillip Newman Specific rights apply [26] . NASA Web Privacy Policy and Important Notices [27] A service of: ASD [28] at NASA [29] / GSFC [30] & Michigan Tech. U. [31] ---------- Site notes: [1] archivepix.html [2] lib/about_apod.html#srapply [3] https://www.flickr.com/photos/144439286@N08 [4] https://soundcloud.com/royaltyfreemusic-nocopyrightmusic/ space-walk-silent-partner-free-download [5] https://www.youtube.com/watch?v=QizgzcZzu_8 [6] https://earthobservatory.nasa.gov/ [7] https://www.youtube.com/watch?v=j1llWnhX1-c [8] https://en.wikipedia.org/wiki/ Nadir#/media/File:Zenith-Nadir-Horizon.svg [9] ap120802.html [10] ap151016.html [11] ap181207.html [12] archivepix.html [13] lib/apsubmit2015.html [14] lib/aptree.html [15] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [16] calendar/allyears.html [17] /apod.rss [18] lib/edlinks.html [19] lib/about_apod.html [20] http://asterisk.apod.com/discuss_apod.php?date=181208 [21] ap181209.html [22] http://www.phy.mtu.edu/faculty/Nemiroff.html [23] http://www.phy.mtu.edu/ [24] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [25] http://www.astro.umd.edu/ [26] lib/about_apod.html#srapply [27] https://www.nasa.gov/about/highlights/HP_Privacy.html [28] https://astrophysics.gsfc.nasa.gov/ [29] https://www.nasa.gov/ [30] https://www.nasa.gov/centers/goddard/ [31] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .