Subj : Daily APOD Report To : All From : Ben Ritchey Date : Sat Sep 22 2018 10:01:07 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 September 22 [2] Window Seat over Hudson Bay Image Credit & Copyright [3] : Ralf Rohner [4] Explanation: On the August 18 night flight from San Francisco to Zurich, a window seat offered this tantalizing view when curtains of light draped a colorful glow [5] across the sky over Hudson Bay. Constructed by digitally stacking six short exposures made with a hand held camera, the scene records the shimmering aurora borealis or northern lights just as the approaching high altitude sunrise illuminated the northeastern horizon. It also caught the flash of a Perseid [6] meteor streaking beneath the handle stars of the Big Dipper of the north. [7] A few days past the meteor shower's peak, its trail still points across the sky toward Perseus. Beautiful aurorae and shower meteors both occur in Earth's upper atmosphere at altitudes of [8] 100 kilometers or so, far above commercial airline fights. The aurora [9] are caused by energetic charged particles from the magnetosphere, while meteors are trails of comet dust [10] . Tomorrow's picture: equinox analemma ------------------------------------------------------------------------------- < [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] image/1809/CurtainsofLightRohner.jpg [3] lib/about_apod.html#srapply [4] https://ralf-rohner.pixels.com/ [5] https://www.flickr.com/photos/skypointer2000/44286394021/ [6] ap180908.html [7] ap160331.html [8] ap160811.html [9] http://www.nasa.gov/mission_pages/sunearth/news/gallery/ aurora-index.html [10] apap160820.html.html [11] ap180921.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=180922 [21] ap180923.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) .