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 October 15
                                      [2]
                     M16: In and Around the Eagle Nebula
                 Image Credit & Copyright: Andrew Klinger [3]

Explanation: From afar, the whole thing looks like an Eagle [4] . A closer
look at the Eagle Nebula [5] , however, shows the bright region [6]  is
actually a window into the center of a larger dark shell of dust [7] . Through
this window, a brightly-lit workshop appears [8] where a whole open cluster
[9] of stars is being formed. In this cavity tall pillars [10]  and round
globules [11]  of dark dust and cold molecular gas [12] remain where stars are
still forming. Already visible are several young bright blue stars [13] whose
light and winds are burning away and pushing back the remaining filaments [14]
and walls of gas and dust. The Eagle emission nebula [15] , tagged M16, lies
about 6500 light years [16]  away, spans about 20 light-years, and is visible
with binoculars [17]  toward the constellation [18]  of the Serpent ( Serpens
[19] ). This picture [20] involved over 25 hours of imaging and combines three
specific emitted colors emitted by sulfur [21]  (colored as red), hydrogen
[22]  (yellow), and oxygen [23]  (blue).

                        Tomorrow's picture: Jupiter UV

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    Authors & editors: Robert Nemiroff [35] (MTU [36] ) & Jerry Bonnell [37]
                                  (UMCP [38] )
          NASA Official:  Phillip Newman Specific rights apply [39] .
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              A service of: ASD [41]  at NASA [42]  / GSFC [43]
                           & Michigan Tech. U. [44]
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Site notes:
  [1] archivepix.html
  [2] image/1810/M16_Klinger_3595.jpg
  [3] https://astrob.in/users/ak_astro/
  [4] http://www.pbs.org/wnet/nature/eagles-introdu...
  [5] http://en.wikipedia.org/wiki/Eagle_Nebula
  [6] http://www.noao.edu/image_gallery/html/im0051...
  [7] ap030706.html
  [8] http://www.youtube.com/watch?v=rvXIgpIuuxw
  [9] open_clusters.html
  [10] ap160424.html
  [11] ap081228.html
  [12] ap171008.html
  [13] ap161019.html
  [14] ap061022.html
  [15] emission_nebulae.html
  [16] http://starchild.gsfc.nasa.gov/docs/StarChild... question19.html
  [17]  http://www.birdwatching.com/optics/ binoculars1.html#How Binoculars
Work
  [18] http://www.astro.wisc.edu/~dolan/constellatio...
extra/constellations.html
  [19] http://chandra.harvard.edu/photo/constellatio... serpens.html
  [20] https://astrob.in/369144/0/
  [21] https://en.wikipedia.org/wiki/Sulfur
  [22] http://www.rsc.org/periodic-table/element/1/h...
  [23] https://www.youtube.com/watch?v=uPK_rSf1WUc
  [24] ap181014.html
  [25] archivepix.html
  [26] lib/apsubmit2015.html
  [27] lib/aptree.html
  [28] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
  [29] calendar/allyears.html
  [30] /apod.rss
  [31] lib/edlinks.html
  [32] lib/about_apod.html
  [33] http://asterisk.apod.com/discuss_apod.php?dat...
  [34] ap181016.html
  [35] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [36] http://www.phy.mtu.edu/
  [37] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
  [38] http://www.astro.umd.edu/
  [39] lib/about_apod.html#srapply
  [40] https://www.nasa.gov/about/highlights/HP_Priv...
  [41] https://astrophysics.gsfc.nasa.gov/
  [42] https://www.nasa.gov/
  [43] https://www.nasa.gov/centers/goddard/
  [44] http://www.mtu.edu/

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