    APOD: 2017 November 19 - NGC 7822: Stars and Dust Pillars in Infrared

                         Astronomy Picture of the Day

    Discover the cosmos! [1] Each day a different image or photograph of our
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                               2017 November 19
                                      [2]
                NGC 7822: Stars and Dust Pillars in Infrared
    Image Credit: WISE [3] , IRSA [4] , NASA [5] ; Processing & Copyright :
                            Francesco Antonucci [6]

Explanation: Young stars themselves are clearing out their nursery in NGC
7822. Within the nebula [7] , bright edges and complex dust sculptures
dominate this detailed skyscape [8]  taken in infrared light [9]  by NASA's
Wide Field Infrared Survey Explorer (WISE [10] ) satellite. NGC 7822 lies at
the edge of a giant molecular cloud [11]  toward the northern constellation
Cepheus [12] , a glowing star forming region that lies about 3,000 light-years
away. The atomic emission of light by the nebula's gas is powered by [13]
energetic radiation from the hot stars, whose powerful wind [14] s and light
also sculpt and erode the denser pillar shapes. Stars could still be forming
inside the pillars [15]  by gravitational collapse [16] , but as the pillars
are eroded away, any forming stars will ultimately be cut off [17] from their
reservoir of star stuff [18] . This field spans around 40 light-years [19]  at
the estimated distance of NGC 7822 [20] .

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Site notes:
  [1] archivepix.html
  [2] image/1711/ngc7822_WISEantonucci_1824c.jpg
  [3] http://www.nasa.gov/mission_pages/WISE/main/
  [4] http://irsa.ipac.caltech.edu/Missions/wise.html
  [5] https://www.nasa.gov/
  [6] mailto: francesco .dot. antonucci @at@ fastwebnet .dot. it
  [7] http://en.wikipedia.org/wiki/NGC_7822
  [8] http://www.astrobin.com/full/135696/0/
  [9] https://science.nasa.gov/ems/07_infraredwaves
  [10] http://www.jpl.nasa.gov/wise/overview.cfm
  [11] http://archive.ncsa.illinois.edu/Cyberia/Bima/ GMC.html
  [12] http://en.wikipedia.org/wiki/Cepheus_(constellation)
  [13] ap051223.html
  [14] ap000318.html
  [15] ap020104.html
  [16] http://hyperphysics.phy-astr.gsu.edu/hbase/astro/gravc.html#c1
  [17] http://maxshouse.com/Ours/Gates-Intro-Jd-Ch+Kl.jpg
  [18] http://hubblesite.org/newscenter/archive/releases/1995/ 44/image/a/
  [19] http://chandra.harvard.edu/photo/cosmic_distance.html
  [20] http://adsabs.harvard.edu/abs/1978ApJ...220..853E
  [21] http://asterisk.apod.com/viewtopic.php?f=28&t=37750
  [22] ap171120.html
  [23] ap171118.html
  [24] archivepix.html
  [25] lib/apsubmit2015.html
  [26] lib/aptree.html
  [27] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [28] calendar/allyears.html
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  [30] lib/edlinks.html
  [31] lib/about_apod.html
  [32] http://asterisk.apod.com/discuss_apod.php?date=171119
  [33] ap171120.html
  [34] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [35] http://www.phy.mtu.edu/
  [36] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
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