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</a/> 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<a/>: 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

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    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]
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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/fis...
  [10] https://www.borrowlenses.com/blog/what-is-a-t...
  [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,-82.926/2...
  [18] https://www.atoptics.co.uk/halo/orplate.htm
  [19] ap030401.html
  [20] https://www.nasa.gov/vision/earth/technologie...
  [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/apo...
  [28] calendar/allyears.html
  [29] /apod.rss
  [30] lib/edlinks.html
  [31] lib/about_apod.html
  [32] http://asterisk.apod.com/discuss_apod.php?dat...
  [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/jbonnel...
  [37] http://www.astro.umd.edu/
  [38] lib/about_apod.html#srapply
  [39] https://www.nasa.gov/about/highlights/HP_Priv...
  [40] https://astrophysics.gsfc.nasa.gov/
  [41] https://www.nasa.gov/
  [42] https://www.nasa.gov/centers/goddard/
  [43] http://www.mtu.edu/

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