                 APOD: 2018 June 6 - A Sun Pillar over Norway

                         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 June 6
                                      [2]
                          A Sun Pillar over Norway
                      Image Credit: Thorleif Rdland [3]

Explanation: Have you ever seen a sun pillar [4] ? When the air is cold and
the Sun is rising or setting [5] , falling ice crystals [6] can reflect
sunlight and create an unusual [7]  column of light. Ice sometimes forms flat,
six-sided shaped crystals [8]  as it falls from high-level clouds [9] . Air
resistance [10]  causes these crystals to lie nearly flat [11]  much of the
time as they flutter to the ground. Sunlight reflects off crystals that are
properly aligned [12] , creating the sun- sun-pillar [13] effect. In the
featured picture taken last week, a sun-pillar [14]  reflects light from a Sun
[15]  setting over Fensf [16] jorden [17] , Norway [18] .

                      Tomorrow's picture: open space [19]

-------------------------------------------------------------------------------
< [20] | Archive [21] | Submissions [22] | Index [23] | Search [24] | Calendar
  [25] | RSS [26] | Education [27] | About APOD [28] | Discuss [29] | > [30]
-------------------------------------------------------------------------------

    Authors & editors: Robert Nemiroff [31] (MTU [32] ) & Jerry Bonnell [33]
                                  (UMCP [34] )
          NASA Official:  Phillip Newman Specific rights apply [35] .
              NASA Web Privacy Policy and Important Notices [36]
              A service of: ASD [37]  at NASA [38]  / GSFC [39]
                           & Michigan Tech. U. [40]
----------
Site notes:
  [1] archivepix.html
  [2] image/1806/SunPillar_Rodland_3648.jpg
  [3] thorleif @at@ ostereidet .dot. no
  [4] https://www.atoptics.co.uk/halo/lpil.htm
  [5] ap140430.html
  [6] http://en.wikipedia.org/wiki/Crystal
  [7] ap060205.html
  [8] https://www.atoptics.co.uk/halo/orplate.htm
  [9] https://spaceplace.nasa.gov/cloud-scramble/en/
  [10] https://www.universetoday.com/73315/what-is-air-resistance/
  [11]
http://faunaimage.com/wp-content/uploads/2017/10/
cat-number-plate-flat-written-funny-floor-humor-brown-license-photo-desktop-
1366x768.jpg
  [12] ap131218.html
  [13] https://en.wikipedia.org/wiki/Light_pillar
  [14] ap030123.html
  [15] https://solarsystem.nasa.gov/solar-system/sun/overview/
  [16] https://www.youtube.com/watch?v=8_7OMDfom-o
  [17] https://en.wikipedia.org/wiki/Fensfjorden
  [18] https://en.wikipedia.org/wiki/Norway
  [19] ap180607.html
  [20] ap180605.html
  [21] archivepix.html
  [22] lib/apsubmit2015.html
  [23] lib/aptree.html
  [24] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [25] calendar/allyears.html
  [26] /apod.rss
  [27] lib/edlinks.html
  [28] lib/about_apod.html
  [29] http://asterisk.apod.com/discuss_apod.php?date=180606
  [30] ap180607.html
  [31] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [32] http://www.phy.mtu.edu/
  [33] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [34] http://www.astro.umd.edu/
  [35] lib/about_apod.html#srapply
  [36] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [37] https://astrophysics.gsfc.nasa.gov/
  [38] https://www.nasa.gov/
  [39] https://www.nasa.gov/centers/goddard/
  [40] http://www.mtu.edu/
