Astronomy Picture of the Day
IC 1396: Emission Nebula in Cepheus
IC 1396: Emission Nebula in Cepheus
2017 July 20

Explanation: Stunning emission nebula IC 1396 mixes glowing cosmic gas and dark dust clouds in the high and far off constellation of Cepheus. Energized by the bright central star seen here, this star forming region sprawls across hundreds of light-years, spanning over three degrees on the sky while nearly 3,000 light-years from planet Earth. Among the intriguing dark shapes within IC 1396, the winding Elephant's Trunk nebula lies just below center. Stars could still be forming inside the dark shapes by gravitational collapse. But as the denser clouds are eroded away by powerful stellar winds and radiation, any forming stars will ultimately be cutoff from the reservoir of star stuff. The gorgeous color view is a composition of image data from narrowband filters, mapping emission from the nebula's atomic oxygen, hydrogen, and sulfur into blue, green, and red hues.

  High Resolution Image
Tomorrow’s Image: pixels in space
Credit & Copyright: César Blanco González
 Courtesy of Astronomy Picture of the Day Index - Main Page & Astronomy Picture of the Day


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