Subj : Daily APOD Report To : All From : Ben Ritchey Date : Wed Oct 24 2018 08:55:18 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 October 24 [2] Light Pillars over Whitefish Bay Image Credit & Copyright: Vincent Brady [3] Explanation: What's happening in the sky? Unusual lights appeared last week to hover above Whitefish Bay on the eastern edge of Lake Superior [5] between the USA [6] and Canada [7] . Unsure of the cause, the Michigan-based astrophotographer [8] switched camera lenses -- from fisheye [9] to telephoto [10] -- and soon realized he was seeing light pillars: vertical lines [12] of [13] light [14] over [15] a ground source that reflect from falling ice crystals [16] . As the ground temperature [17] was above freezing, the flat crystals [18] likely melted as they approached the ground, creating a lower end [19] to the vertical light pillars. The red ground lights originated from wind turbines [20] on Ile Parisienne [21] , a Canadian Island visible across the bay [22] . Tomorrow's picture: dark markings on the sky ------------------------------------------------------------------------------- < [23] | Archive [24] | Submissions [25] | Index [26] | Search [27] | Calendar [28] | RSS [29] | Education [30] | About APOD [31] | Discuss [32] | > [33] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [34] (MTU [35] ) & Jerry Bonnell [36] (UMCP [37] ) NASA Official: Phillip Newman Specific rights apply [38] . NASA Web Privacy Policy and Important Notices [39] A service of: ASD [40] at NASA [41] / GSFC [42] & Michigan Tech. U. [43] ---------- Site notes: [1] archivepix.html [2] image/1810/LightPillars_Brady_4000.jpg [3] https://www.vincentbrady.com/about-the-artist [4] https://en.wikipedia.org/wiki/Whitefish_Bay [5] https://en.wikipedia.org/wiki/Lake_Superior [6] https://en.wikipedia.org/wiki/United_States [7] https://en.wikipedia.org/wiki/Canada [8] https://www.vincentbrady.com/about-the-artist [9] https://www.photographymad.com/pages/view/fisheye-lenses [10] https://www.borrowlenses.com/blog/what-is-a-telephoto-lens/ [11] https://www.atoptics.co.uk/halo/lpil.htm [12] ap160208.html [13] ap141228.html [14] ap131218.html [15] ap140131.html [16] https://www.atoptics.co.uk/halo/platcol.htm [17] https://darksky.net/details/42.6236,-82.926/2018-10-16/us12/en [18] https://www.atoptics.co.uk/halo/orplate.htm [19] ap030401.html [20] https://www.nasa.gov/vision/earth/technologies/wind_turbines.html [21] https://en.wikipedia.org/wiki/Ile_Parisienne [22] https://www.youtube.com/watch?v=6cCE3cHn4Nk [23] ap181023.html [24] archivepix.html [25] lib/apsubmit2015.html [26] lib/aptree.html [27] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [28] calendar/allyears.html [29] /apod.rss [30] lib/edlinks.html [31] lib/about_apod.html [32] http://asterisk.apod.com/discuss_apod.php?date=181024 [33] ap181024.html [34] http://www.phy.mtu.edu/faculty/Nemiroff.html [35] http://www.phy.mtu.edu/ [36] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [37] http://www.astro.umd.edu/ [38] lib/about_apod.html#srapply [39] https://www.nasa.gov/about/highlights/HP_Privacy.html [40] https://astrophysics.gsfc.nasa.gov/ [41] https://www.nasa.gov/ [42] https://www.nasa.gov/centers/goddard/ [43] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .