                         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.

                                2019 January 15
                                      [2]
                          The Heart and Soul Nebulas
                  Image Credit & Copyright: Mario Zauner [3]

Explanation: Is the heart and soul of our Galaxy located in Cassiopeia [4] ?
Possibly not, but that is where two bright emission nebulas [5]  nicknamed
Heart and Soul [6] can be found. The Heart Nebula [7] , officially dubbed IC
1805 [8]  and visible in the featured image on the bottom right, has a shape
reminiscent of a classical heart symbol [9] . The Soul Nebula [10] is
officially designated IC 1871 and is visible on the upper left. Both nebulas
[11]  shine brightly in the red light of energized [12] hydrogen [13] . Also
shown in this three-color montage is light emitted from sulfur [14] , shown in
yellow, and oxygen [15] , shown in blue. Several young open clusters [16]  of
stars [17]  are visible near the nebula centers. Light [18]  takes about 6,000
years to reach us from these nebulas [19] , which together span roughly 300
light years [20] . Studies [21]  of stars and clusters like those found in the
Heart [22]  and Soul [23]  Nebulas have focused on how massive stars [24] form
and how they affect their environment [25] .

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                        Tomorrow's picture: open space

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    Authors & editors: Robert Nemiroff [41] (MTU [42] ) & Jerry Bonnell [43]
                                  (UMCP [44] )
          NASA Official:  Phillip Newman Specific rights apply [45] .
              NASA Web Privacy Policy and Important Notices [46]
              A service of: ASD [47]  at NASA [48]  / GSFC [49]
                           & Michigan Tech. U. [50]
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Site notes:
  [1] archivepix.html
  [2] image/1901/HeartSoul_Zauner_1952.jpg
  [3] mailto: mariozauner @at@ icloud .dot. com
  [4] http://www.hawastsoc.org/deepsky/cas/
  [5] emission_nebulae.html
  [6]  http://www.youtube.com/watch?v=YsIL07eOqOU
  [7] ap151027.html
  [8] ap111025.html
  [9] http://en.wikipedia.org/wiki/Heart_(symbol)
  [10] ap180821.html
  [11] ap160924.html
  [12] ap030410.html
  [13] http://periodic.lanl.gov/1.shtml
  [14] https://en.wikipedia.org/wiki/Sulfur
  [15] https://youtu.be/LM_CgtFORzw
  [16] open_clusters.html
  [17]
https://science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve
  [18] http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html
  [19] ap180823.html
  [20] http://chandra.harvard.edu/photo/cosmic_distance.html
  [21] http://adsabs.harvard.edu/abs/1999A%26AS..136..313S
  [22] http://en.wikipedia.org/wiki/Heart_Nebula
  [23] http://en.wikipedia.org/wiki/Soul_Nebula
  [24] ap030622.html
  [25]
https://s-media-cache-ak0.pinimg.com/564x/0a/4e/27/
0a4e2732638c9d7532de25394eea6257.jpg
  [26] https://www.instagram.com/astronomypicturesdaily/
  [27] https://www.facebook.com/AstronomyPictureOfTheDay
  [28] https://www.reddit.com/r/apod
  [29] http://twitter.com/apod/
  [30] ap190114.html
  [31] archivepix.html
  [32] lib/apsubmit2015.html
  [33] lib/aptree.html
  [34] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [35] calendar/allyears.html
  [36] /apod.rss
  [37] lib/edlinks.html
  [38] lib/about_apod.html
  [39] http://asterisk.apod.com/discuss_apod.php?date=190115
  [40] ap190116.html
  [41] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [42] http://www.phy.mtu.edu/
  [43] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [44] http://www.astro.umd.edu/
  [45] lib/about_apod.html#srapply
  [46] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [47] https://astrophysics.gsfc.nasa.gov/
  [48] https://www.nasa.gov/
  [49] https://www.nasa.gov/centers/goddard/
  [50] http://www.mtu.edu/
