Crescent Nebula
NGC 6888
Dados do Objeto
- Designação do Catálogo
- C27
- Tipo
- EmissionNebula
- Constelação
- Cygnus
- Magnitude
- 10.0
- Ascensão Reta
- 20h 12m 07.9s
- Declinação
- +38° 21' 00.0"
- Distância
- 5,000 anos-luz
- Tamanho Angular
- 20
Imagem de Levantamento
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Sobre Crescent Nebula
Descrição
The Crescent Nebula (NGC 6888) is an emission nebula in Cygnus, about 5,000 light-years away. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 colliding with slower material the star ejected when it was a red supergiant.
Dicas de Observação
A challenging visual target. An OIII filter is almost essential, revealing the crescent-shaped arc in an 8-inch or larger telescope. Located near the center of Cygnus in the rich Milky Way, which provides a spectacular star field. Best in summer.
História
Discovered by William Herschel on September 15, 1792. The nebula is a textbook example of a wind-blown bubble created by a massive star's violent final evolutionary stages before it eventually explodes as a supernova.
Curiosidades
The Wolf-Rayet star WR 136 at the center is losing mass at a staggering rate and will likely explode as a supernova within a few hundred thousand years. The nebula is expanding at about 75 km/s.
Fotos da Comunidade (1)
Credit: Chuck Ayoub. License: CC0. (Wikimedia Commons)
Skybred Mar 2, 2026