Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
Crescent Neb C27, Robert.S
Crescent Neb C27
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Crescent Neb C27

Crescent Neb C27, Robert.S
Crescent Neb C27
Powered byPixInsight

Crescent Neb C27

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Description

"The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth and about 25 light-years wide.  It is formed by the fast stellar wind from the Wolf-Rayet star WR 136, right in the center of the nebula, 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."Mike Behnke

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Crescent Neb C27, Robert.S