Crescent Nebula NGC6888, Prabhakar

Crescent Nebula NGC6888

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Description

Crescent Nebula (NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away. 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 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward.

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Imaged from Everglades, South Florida

Ha - 12x10mins

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Revisions

  • Crescent Nebula NGC6888, Prabhakar
    Original
  • Final
    Crescent Nebula NGC6888, Prabhakar
    B

Histogram

Crescent Nebula NGC6888, Prabhakar