Thursday, August 8, 2013

Swan Nebula (M17)


This image was taken from my deck in Abbotsford on July 12, 2013.  It consists of 9 10-minute images registered and combined in CCDStack and processed in Photoshop CS5.

The Swan Nebula is located in the rich star fields of Sagittarius 5,000 light years away.  It is a close neighbour of M16. Bright but obscured stars, about 20 times more massive than the Sun, are hidden in the nebulousity. Radiation from these stars is ionizing the cloud of hydrogen gas.  The bright central region is the result of light emitted from the hottest gas, mixed with reflected light from the embedded stars.

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