NGC 6888
1. Crescent NebulaThe Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light years away. 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 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward.
Read “Crescent Nebula” on English Wikipedia
Read “NGC 6888” on Japanese Wikipedia
Read “Crescent Nebula” on DBpedia
Read “Crescent Nebula” on English Wikipedia
Read “NGC 6888” on Japanese Wikipedia
Read “Crescent Nebula” on DBpedia
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