           APOD: 2017 August 20 - Time Lapse: A Total Solar Eclipse

                         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.

                                2017 August 20
                      Time-Lapse: A Total Solar Eclipse
                   Video Credit & Copyright: Colin Legg [2]

Explanation: Have you ever experienced [3]  a total eclipse of the Sun? This
time-lapse movie [4] depicts such an eclipse in dramatic detail, seen [5]
from [6] Australia [7]  in 2012. As the video begins, a slight dimming of the
Sun and the surrounding Earth is barely perceptible. As the Moon moves to
cover [8] nearly the entire Sun, darkness sweeps in from the left -- the fully
blocked part of the Sun. At totality, only the bright solar corona [9]
extends past the edges of the Moon, and darkness surrounds you. Distant
horizons are still bright, though, as they are not in the darkest part of the
shadow [10] . At mid-totality the darkness dips to the horizon below the
eclipsed Sun, created by the shadow cone [11]  -- a corridor of shadow that
traces back to the Moon. As the total solar eclipse [12]  ends -- usually
after a few minutes -- the process reverses and Moon's shadow [13]  moves off
to the other side. Tomorrow afternoon's total solar eclipse -- visible as at
least a partial eclipse over all of North America -- can be experienced [14]
at social gatherings [15] , some of which are being organized by local
libraries [16] .

              Tomorrow's Eclipse: Live NASA Streaming Video [17]
                      Tomorrow's picture: after dark [18]

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    Authors & editors: Robert Nemiroff [30] (MTU [31] ) & Jerry Bonnell [32]
                                  (UMCP [33] )
          NASA Official:  Phillip Newman Specific rights apply [34] .
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                           & Michigan Tech. U. [39]
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Site notes:
  [1] archivepix.html
  [2] https://www.facebook.com/ColinLeggPhotography
  [3] https://www.youtube.com/watch?v=sbgjdTQHZXY
  [4] http://vimeo.com/53641212
  [5] ap121116.html
  [6] ap121117.html
  [7] http://en.wikipedia.org/wiki/Australia
  [8] http://asterisk.apod.com/viewtopic.php?f=29&t=30001
  [9] ap100316.html
  [10] ap170717.html
  [11] ap100804.html
  [12] http://en.wikipedia.org/wiki/Total_solar_eclipse
  [13] ap110102.html
  [14] ap170730.html
  [15] https://eclipse2017.nasa.gov/planning-your-eclipse-party
  [16] https://eclipse2017.nasa.gov/libraries
  [17] https://www.nasa.gov/eclipselive
  [18] ap170821.html
  [19] ap170819.html
  [20] archivepix.html
  [21] lib/apsubmit2015.html
  [22] lib/aptree.html
  [23] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [24] calendar/allyears.html
  [25] /apod.rss
  [26] lib/edlinks.html
  [27] lib/about_apod.html
  [28] http://asterisk.apod.com/discuss_apod.php?date=170820
  [29] ap170821.html
  [30] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [31] http://www.phy.mtu.edu/
  [32] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [33] http://www.astro.umd.edu/
  [34] lib/about_apod.html#srapply
  [35] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [36] https://astrophysics.gsfc.nasa.gov/
  [37] https://www.nasa.gov/
  [38] https://www.nasa.gov/centers/goddard/
  [39] http://www.mtu.edu/
