Crescent Nebula
NGC 6888
천체 데이터
- 카탈로그 지정명
- C27
- 유형
- EmissionNebula
- 별자리
- Cygnus
- 등급
- 10.0
- 적경
- 20h 12m 07.9s
- 적위
- +38° 21' 00.0"
- 거리
- 5,000 광년
- 각크기
- 20
서베이 이미지
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Crescent Nebula 소개
설명
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.
관측 팁
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.
역사
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.
재미있는 사실
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.
커뮤니티 사진 (1)
Credit: Chuck Ayoub. License: CC0. (Wikimedia Commons)
Skybred Mar 2, 2026