Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  28 Cyg  ·  28 b02 Cyg  ·  29 Cyg  ·  29 b03 Cyg  ·  34 Cyg)  ·  34 P Cyg  ·  36 Cyg  ·  B343  ·  B344  ·  Crescent Nebula  ·  HD190359  ·  HD190402  ·  HD190428  ·  HD190446  ·  HD190466  ·  HD190467  ·  HD190549  ·  HD190570  ·  HD190628  ·  HD190629  ·  HD190700  ·  HD190771  ·  HD190863  ·  HD190917  ·  HD190991  ·  HD191024  ·  HD191025  ·  HD191045  ·  HD191139  ·  HD191158  ·  And 708 more.
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NGC6888 Crescent nebula and surroundings, Peter Horstink
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NGC6888 Crescent nebula and surroundings

Getting plate-solving status, please wait...
NGC6888 Crescent nebula and surroundings, Peter Horstink
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NGC6888 Crescent nebula and surroundings

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Description

From Wikipedia:

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.[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 nebula and surroundings, Peter Horstink

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