    APOD: 2017 August 27 - The Heart Nebula in Hydrogen, Oxygen, and Sulfur

                         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 27
                                      [2]
              The Heart Nebula in Hydrogen, Oxygen, and Sulfur
                  Image Credit & Copyright: Peter Jenkins [3]

Explanation: What powers the Heart Nebula? The large emission nebula [4]
dubbed IC 1805 [5]  looks, in whole, like a heart [6] . The nebula's glow --
as well as the shape of the gas and dust clouds -- is powered by by stellar
wind [7] s and radiation [8]  from massive hot stars in the nebula's newborn
star cluster Melotte 15 [9] . This deep telescopic image maps the pervasive
light of narrow emission lines [10]  from atoms of hydrogen [11] , oxygen [12]
, and sulfur [13] in the nebula. The field of view spans just over two degrees
[14]  on the sky, so that it appears larger than four times the diameter of a
full moon. The cosmic heart is found in the constellation of Cassiopeia [15] ,
the boastful mythical Queen [16]  of Aethiopia [17]  .

                    Tomorrow's picture: double eclipse [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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Site notes:
  [1] archivepix.html
  [2] image/1708/Heart_Jenkins_3280.jpg
  [3] http://www.pjastro.co.uk/
  [4] emission_nebulae.html
  [5] ap040917.html
  [6] https://en.wikipedia.org/wiki/Heart_(symbol)
  [7] https://solarscience.msfc.nasa.gov/SolarWind.shtml
  [8]
https://www.nasa.gov/audience/foreducators/postsecondary/features/
F_Understanding_Space_Radiation.html
  [9] ap131227.html
  [10] https://heasarc.gsfc.nasa.gov/docs/xte/learning_center/xray_techl.html
  [11] http://periodic.lanl.gov/1.shtml
  [12] https://en.wikipedia.org/wiki/Oxygen
  [13] https://www.livescience.com/28939-sulfur.html
  [14] https://mathwithbaddrawings.com/2013/05/02/degrees-vs-radians/
  [15] http://en.wikipedia.org/wiki/ Cassiopeia_%28constellation%29
  [16] http://www.pantheon.org/articles/c/cassiopeia.html
  [17] http://en.wikipedia.org/wiki/Aethiopia
  [18] ap170828.html
  [19] ap170826.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=170827
  [29] ap170828.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/
