Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  HD192003  ·  HD192020  ·  HD192102  ·  HD192123  ·  HD192163  ·  HD192182  ·  HD192303  ·  HD192361  ·  HD192444  ·  HD228139  ·  HD228152  ·  HD228153  ·  HD228185  ·  HD228186  ·  HD228205  ·  HD228243  ·  HD228261  ·  HD228262  ·  HD228289  ·  HD228290  ·  HD228304  ·  HD228311  ·  HD228324  ·  HD228376  ·  LBN 203  ·  NGC 6888  ·  Sh2-105
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Crescent Nebula - NGC 6888, Evangelos Souglakos
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Crescent Nebula - NGC 6888

Getting plate-solving status, please wait...
Crescent Nebula - NGC 6888, Evangelos Souglakos
Powered byPixInsight

Crescent Nebula - NGC 6888

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Description

The Crescent Nebula (NGC 6888 or Caldwell 27) is an emission nebula in the Cygnus constellation, about 5000 light years away. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energising the slower moving wind ejected by the star when it became a red giant around 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.

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Crescent Nebula - NGC 6888, Evangelos Souglakos