Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  HD192003  ·  HD192020  ·  HD192163  ·  HD192182  ·  HD192303  ·  HD192361  ·  HD228243  ·  HD228304  ·  HD228376  ·  LBN 203  ·  NGC 6888  ·  Sh2-105
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NGC 6888 Crescent Nebula, rdhand
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NGC 6888 Crescent Nebula

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NGC 6888 Crescent Nebula, rdhand
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NGC 6888 Crescent Nebula

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Description

The Crescent Nebula (also known as NGC 6888) is an emission nebula about 5000 light-years away. It is formed by the fast stellar wind from the Wolf-Rayet star 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.

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  • NGC 6888 Crescent Nebula, rdhand
    Original
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    NGC 6888 Crescent Nebula, rdhand
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NGC 6888 Crescent Nebula, rdhand

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