| Description | The Crescent Nebula, also known as Caldwell 27 and Sharpless 105, is an emission nebula located in the constellation Cygnus. It was discovered by William Herschel in 1792. The 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 transitioned into a red giant around 250,000 to 400,000 years ago. This collision creates a shell and generates two shock waves: one moving outward and the other moving inward. The inward-moving shock wave heats the stellar wind to temperatures that emit X-rays. |
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| Data/Processing Attribution | The data was purchased from Telescope Live, and I did the processing only. |
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| Distances/Size | Distance to the object-5,000 light years. Dimensions on the sky is 18′ X 12′ (minutes) |
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| Equipment | Mount-Software Bisque Paramount MX+ GEM; Scope- Takahashi, 106 mm aperture, 382mm focal length; Camera- QHY600 M Pro. |
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| Observatory | Telescope Live, EL Sauce, Rio Hurtado valley, Chile. |
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| Exposure | LRGB filters, total exposure- 15 hours 20 min. |
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