"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
Right Ascension 20h 12m 7s - Declination +38° 21.3′

Imaging Telescope or Lens: Taken with an Astro-Tech 12" Ritchey - Chrétien Reflector Astrograph
Focal reducer: AP 27TVPH .75 reducer Camera SBIG STF 8300 CCD Mono, Filter Astrodon Ha 5nm

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 is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the 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. It was discovered by Friedrich Wilhelm Herschel in 1792.

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