Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888  ·  Sh2-105
NGC6888 (Crescent Nebula), Isaac Suttell
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NGC6888 (Crescent Nebula)

NGC6888 (Crescent Nebula), Isaac Suttell
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NGC6888 (Crescent Nebula)

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Description

The Crescent Nebula "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-emitting temperatures. " ~Wikipedia

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NGC6888 (Crescent Nebula), Isaac Suttell