File:NGC 6888 (Crescent Nebula) bicolor.jpg
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[edit]DescriptionNGC 6888 (Crescent Nebula) bicolor.jpg |
English: The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by Friedrich Wilhelm Herschel in 1792. It 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[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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Source | Own work |
Author | Remidone |
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current | 13:14, 24 August 2018 | 1,800 × 1,199 (1.05 MB) | Remidone (talk | contribs) | User created page with UploadWizard |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
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Software used | Adobe Photoshop CS5 Windows |
File change date and time | 11:48, 5 February 2017 |
Color space | sRGB |
Date and time of digitizing | 12:08, 5 February 2017 |
Date metadata was last modified | 12:48, 5 February 2017 |
Unique ID of original document | xmp.did:393F470F88EBE611AD48B19C05709ED0 |
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5 February 2017
1,095,777 byte
1,199 pixel
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5ef0aa6ee5240098778a8ef2c380526ef41e5c8d
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