              APOD: 2017 September 22 - Solar Eclipse Solargraph

                         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 September 22
                                      [2]
                          Solar Eclipse Solargraph
        Image Credit & Copyright [3] : Chuck Bueter [4] (Nightwise.org)

Explanation: Today is the September equinox [5] . Heading south, the Sun's
path through the sky will cross the celestial equator at 20:02 UT [6] . Of
course the equinox date results in (mostly) equal night and day all over
planet Earth [7] . But on August 21 the Sun's path through the sky found a
little extra-night for some. Made with a drink can pinhole camera and
light-sensitive paper, this creative solargraph [8] follows the Sun's path on
that date. An all-day exposure, it traces the Sun's arc still rising high in
northern skies, aligned with a panoramic snapshot of the local landscape at
the bottom. The gap in the arc represents the duration of the partial and
total phases of the solar eclipse [9]  in clear skies over Lowman, Idaho, USA.
There, the extra-night [10]  (totality) lasted for about 2 minutes. The broad
gap in the Sun's arc also covers the loss of sunlight during the more extended
partial eclipse phases.

                 Tomorrow's picture: a few light-minutes [11]

-------------------------------------------------------------------------------
< [12] | Archive [13] | Submissions [14] | Index [15] | Search [16] | Calendar
  [17] | RSS [18] | Education [19] | About APOD [20] | Discuss [21] | > [22]
-------------------------------------------------------------------------------

    Authors & editors: Robert Nemiroff [23] (MTU [24] ) & Jerry Bonnell [25]
                                  (UMCP [26] )
          NASA Official:  Phillip Newman Specific rights apply [27] .
              NASA Web Privacy Policy and Important Notices [28]
              A service of: ASD [29]  at NASA [30]  / GSFC [31]
                           & Michigan Tech. U. [32]
----------
Site notes:
  [1] archivepix.html
  [2] image/1709/sunprint-over-pano-copyrightBueter.jpg
  [3] lib/about_apod.html#srapply
  [4] http://www.nightwise.org/contact_us
  [5] https://earthobservatory.nasa.gov/IOTD/view.php?id=52248
  [6] http://aa.usno.navy.mil/data/docs/EarthSeasons.php
  [7] https://eol.jsc.nasa.gov/ESRS/HDEV/
  [8] http://www.nightwise.org/single-post/2017/08/25/
Solar-Eclipse-Yields-Unique-Paper-Image
  [9] ap170901.html
  [10] ap170831.html
  [11] ap170923.html
  [12] ap170921.html
  [13] archivepix.html
  [14] lib/apsubmit2015.html
  [15] lib/aptree.html
  [16] http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [17] calendar/allyears.html
  [18] /apod.rss
  [19] lib/edlinks.html
  [20] lib/about_apod.html
  [21] http://asterisk.apod.com/discuss_apod.php?date=170922
  [22] ap170923.html
  [23] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [24] http://www.phy.mtu.edu/
  [25] http://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [26] http://www.astro.umd.edu/
  [27] lib/about_apod.html#srapply
  [28] http://www.nasa.gov/about/highlights/HP_Privacy.html
  [29] http://astrophysics.gsfc.nasa.gov/
  [30] http://www.nasa.gov/
  [31] http://www.nasa.gov/centers/goddard/
  [32] http://www.mtu.edu/
