                         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 August 21
                                      [2]
                     Glowing Elements in the Soul Nebula
         Image Credit & Copyright: Jesús M.Vargas & Maritxu Poyal [3]

Explanation: Stars are forming in the Soul of the Queen of Aethopia. More
specifically, a large star forming region called the Soul Nebula [4] (IC 1898)
can be found in the direction of the constellation Cassiopeia [5] , who Greek
mythology credits as the vain wife [6] of a King who long ago ruled lands [7]
surrounding the upper Nile [8]  river. The Soul Nebula [9]  houses several
open clusters of stars [10] , a large radio source known as W5 [11] , and huge
evacuated bubbles formed by the winds of young massive stars [12] . Located
about 6,500 light years away, the Soul Nebula [13]  spans about 100 light
years [14] and is usually imaged next to [15]  its celestial neighbor the
Heart Nebula [16]  (IC 1805). The featured image [17] is a composite of three
exposures in different colors: red as emitted by hydrogen [18]  gas, yellow as
emitted by sulfur [19] , and blue as emitted by oxygen [20] .

                    News: New APOD mirror in French [21]
                      Tomorrow's picture: galaxy center

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    Authors & editors: Robert Nemiroff [33] (MTU [34] ) & Jerry Bonnell [35]
                                  (UMCP [36] )
          NASA Official:  Phillip Newman Specific rights apply [37] .
              NASA Web Privacy Policy and Important Notices [38]
              A service of: ASD [39]  at NASA [40]  / GSFC [41]
                           & Michigan Tech. U. [42]
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Site notes:
  [1] archivepix.html
  [2] image/1808/SoulNebula_Vargas_3106.jpg
  [3] http://www.sky-astrophotography.com/
  [4] http://en.wikipedia.org/wiki/Soul_Nebula
  [5] http://en.wikipedia.org/wiki/Cassiopeia_%28constellation%29
  [6] http://en.wikipedia.org/wiki/Cassiopeia_%28mythology%29
  [7] http://en.wikipedia.org/wiki/Ethiopia_%28mythology%29
  [8] http://en.wikipedia.org/wiki/Nile_river_delta
  [9] http://www.atlasoftheuniverse.com/nebulae/ic1805.html
  [10] http://asterisk.apod.com/viewtopic.php?f=24&t=18009
  [11] ap111120.html
  [12]
https://science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve
  [13] ap171004.html
  [14] https://spaceplace.nasa.gov/light-year/en/
  [15] ap100601.html
  [16] ap080914.html
  [17]
http://www.sky-astrophotography.com/
index.php?nodo=3titulo=galeria&level=picture&id=1166
  [18] https://www.youtube.com/watch?v=nLuOM9aOWvk
  [19] https://en.wikipedia.org/wiki/Sulfur
  [20] https://periodic.lanl.gov/8.shtml
  [21] https://www.apod.tv/
  [22] ap180820.html
  [23] archivepix.html
  [24] lib/apsubmit2015.html
  [25] lib/aptree.html
  [26] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [27] calendar/allyears.html
  [28] /apod.rss
  [29] lib/edlinks.html
  [30] lib/about_apod.html
  [31] http://asterisk.apod.com/discuss_apod.php?date=180821
  [32] ap180822.html
  [33] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [34] http://www.phy.mtu.edu/
  [35] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [36] http://www.astro.umd.edu/
  [37] lib/about_apod.html#srapply
  [38] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [39] https://astrophysics.gsfc.nasa.gov/
  [40] https://www.nasa.gov/
  [41] https://www.nasa.gov/centers/goddard/
  [42] http://www.mtu.edu/
