In this crowded starfield spanning some 3 degrees within the high flying constellation Cygnus,
the eye is drawn to the Cocoon Nebula. A compact star forming region, the cosmic Cocoon punctuates
a long trail of obscuring interstellar dust clouds. Cataloged as IC 5146, the nebula is nearly
15 light-years wide, located some 4,000 light years away. Like other star forming regions, it
stands out in red, glowing, hydrogen gas excited by the young, hot stars and blue, dust-reflected
starlight at the edge of an otherwise invisible molecular cloud. In fact, the bright star near
the center of this nebula is likely only a few hundred thousand years old, powering the nebular
glow as it clears out a cavity in the molecular cloud's star forming dust and gas. But the long
dusty filaments that appear dark in this visible light image are themselves hiding stars in the
process of formation, seen at infrared wavelengths.
[Text from APOD]