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 November 22
                                      [2]
                             Portrait of NGC 281
               Image Credit & Copyright [3] : Jeremiah Roth [4]

Explanation: Look through the cosmic cloud cataloged as NGC 281 and you might
miss the stars of open cluster IC 1590 [5] . Still, formed within the nebula
[6]  that cluster's young, massive stars ultimately power the pervasive
nebular glow. The eye-catching shapes looming in this portrait of NGC 281 [7]
are sculpted dusty columns and dense Bok globules [8] seen in silhouette,
eroded by intense, energetic winds and radiation from the hot cluster stars.
If they survive long enough, the dusty structures could also be sites of
future star formation. Playfully called [9] the Pacman Nebula because of its
overall shape, NGC 281 is about 10,000 light-years away in the constellation
Cassiopeia [10] . This sharp composite image was made through narrow-band [11]
 filters. It combines emission from the nebula's hydrogen and oxygen atoms to
synthesize red, green, and blue colors. The scene spans well over 80
light-years at the estimated distance of NGC 281.

                  Tomorrow's picture: above a sea of clouds

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Site notes:
  [1] archivepix.html
  [2] image/1811/NGC281_JRoth.jpg
  [3] lib/about_apod.html#srapply
  [4] https://astrob.in/users/Jeremiah.Roth54/
  [5] http://adsabs.harvard.edu/abs/1997AJ....113.2116G
  [6] http://chandra.harvard.edu/photo/2007/ngc281/
  [7] https://astrob.in/377436/?nc=user
  [8] http://heritage.stsci.edu/2006/13/index.html
  [9] http://www.google.com/pacman/
  [10] http://www.hawastsoc.org/deepsky/cas/
  [11] ap071102.html
  [12] ap181121.html
  [13] archivepix.html
  [14] lib/apsubmit2015.html
  [15] lib/aptree.html
  [16] https://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=181122
  [22] ap181123.html
  [23] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [24] http://www.phy.mtu.edu/
  [25] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [26] http://www.astro.umd.edu/
  [27] lib/about_apod.html#srapply
  [28] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [29] https://astrophysics.gsfc.nasa.gov/
  [30] https://www.nasa.gov/
  [31] https://www.nasa.gov/centers/goddard/
  [32] http://www.mtu.edu/

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