Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  HD191396  ·  HD191397  ·  HD191424  ·  HD191472  ·  HD191703  ·  HD192003  ·  HD192020  ·  HD192041  ·  HD192078  ·  HD192079  ·  HD192102  ·  HD192123  ·  HD192163  ·  HD192182  ·  HD192303  ·  HD192361  ·  HD192422  ·  HD192443  ·  HD192444  ·  HD192537  ·  HD192744  ·  HD192766  ·  HD192934  ·  HD227860  ·  HD227870  ·  HD227872  ·  HD227912  ·  HD227929  ·  HD227950  ·  And 98 more.
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NGC 6888 - The Crescent Nebula, Aleksandar Todorovic
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NGC 6888 - The Crescent Nebula

Getting plate-solving status, please wait...
NGC 6888 - The Crescent Nebula, Aleksandar Todorovic
Powered byPixInsight

NGC 6888 - The Crescent Nebula

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Description

The Crescent Nebula (also known as NGC 6888Caldwell 27Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792.=10.5px It is formed by the fast stellar wind from the Wolf-Rayet starWR 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=10.5px 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 - The Crescent Nebula, Aleksandar Todorovic