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Astronomy Picture of the Day

Posted By Editor On November 16, 2011 @ 7:33 am In Photo Essays | Comments Disabled

Within the nebula, bright edges and dark shapes are highlighted in this colorful skyscape. The image includes data from narrowband filters, mapping emission from atomic oxygen, hydrogen, and sulfur into blue, green, and red hues.

 

NGC7822 fernandez20001 670x474 Astronomy Picture of the Day [1]

 

NGC 7822 in Cepheus 
Image Credit & Copyright [2]Manuel Fernández Suarez [3]

Explanation: Hot, young stars and cosmic pillars of gas and dust seem to crowd into NGC 7822. At the edge of a giant molecular cloud [4] toward the northern constellation Cepheus [5], the glowing star forming region lies about 3,000 light-years away. Within the nebula, bright edges and dark shapes are highlighted in this colorful skyscape [6]. The image includes data from narrowband [7] filters, mapping emission from atomic oxygen, hydrogen, and sulfur into blue, green, and red hues. The atomic emission is powered by [8] energetic radiation from the hot stars, whose powerful winds and radiation also sculpt and erode the denser pillar shapes. Stars could still be forming inside the pillars [9] by gravitational collapse [10], but as the pillars are eroded away, any forming stars will ultimately be cutoff from their reservoir of star stuff [11]. This field spans around 40 light-years at the estimated distance of NGC 7822.


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URLs in this post:

[1] Image: http://nightsky.at/Photo/Neb/NGC7822_WN.html

[2] Copyright: http://apod.nasa.gov/apod/lib/about_apod.html#srapply

[3] Manuel Fernández Suarez: http://www.elfirmamento.com/

[4] molecular cloud: http://archive.ncsa.illinois.edu/Cyberia/Bima/GMC.html

[5] constellation Cepheus: http://www.astropix.com/HTML/E_SUM_N/CEPHEUSO.HTM

[6] colorful skyscape: http://www.elfirmamento.com/galeria/n_band/page/NGC7822_1000.html

[7] narrowband: http://apod.nasa.gov/apod/ap060324.html

[8] powered by: http://apod.nasa.gov/apod/ap051223.html

[9] inside the pillars: http://apod.nasa.gov/apod/ap020104.html

[10] gravitational collapse: http://hyperphysics.phy-astr.gsu.edu/hbase/astro/gravc.html#c1

[11] star stuff: http://hubblesite.org/newscenter/archive/releases/1995/44/image/a/

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