"Though my soul may set in darkness, it will rise in perfect light I have loved the stars too fondly to be fearful of the night."


NGC 6888 The Crescent Nebula in Cygnus
Widefield View

Imaging Telescope or Lens: Taken with an AIRY Apo 65F 420mm f/6.5 Astrograph
Camera SBIG STF 8300 CCD Mono, Filter Baader Ha 7nm

This is a Widefield view of the Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing he slower moving wind ejected by the star when it became a red giant around 250.000 to 400.000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray - ermitting temperatures. WR 136 is a Wolf-Rayet star Located in the constellation Cygnus. It is in the center of the Crescent Nebula . Its age is estimated to be around 4.7 million years and it is nearing the end of its life. Within a few hundred thousand years, it is exspected to explode as a Supernova. And bear in mind that one light-year is 6,000,000,000,000 miles.

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