Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  27 Cyg  ·  27 b01 Cyg  ·  28 Cyg  ·  28 b02 Cyg  ·  29 Cyg  ·  29 b03 Cyg  ·  34 Cyg)  ·  34 P Cyg  ·  36 Cyg  ·  B145  ·  B146  ·  B147  ·  Crescent Nebula  ·  HD190275  ·  HD190381  ·  HD190402  ·  HD190428  ·  HD190429  ·  HD190466  ·  HD190467  ·  HD190549  ·  HD190570  ·  HD190628  ·  HD190629  ·  HD190700  ·  HD190771  ·  HD190863  ·  HD190864  ·  HD190917  ·  HD190919  ·  And 729 more.
The Crescent Nebula, Freddy Bowles
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The Crescent Nebula

The Crescent Nebula, Freddy Bowles
Powered byPixInsight

The Crescent Nebula

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Description

The Crescent Nebula Complex also known as NGC 6888, Caldwell 27, or Sharpless 105 is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth.

The Crescent Nebula is formed by the fast stellar wind from the Wolf-Rayet star WR 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 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 (> 1 million degrees C) temperatures.

Shot from my back yard in Pace FL 
This one is nearly 18 hrs of exposure time of a 2 panel mosaic stitched together
William optics Z61 Zwo 2600mm
Antila nb filters 35 x 300 seconds exposure per filters on each panel

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