Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
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NGC6888 Crescent, Richard Blake
NGC6888 Crescent
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NGC6888 Crescent

Getting plate-solving status, please wait...
NGC6888 Crescent, Richard Blake
NGC6888 Crescent
Powered byPixInsight

NGC6888 Crescent

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Description

From Wikipedia: 5000 light-years away from Earth. It was discovered by William Herschel in 1792.[2] 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[3] to 400,000[citation needed] 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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NGC6888 Crescent, Richard Blake