Cygnus X-1
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English
Etymology
From Cygnus + X + 1. From being the first discovered discrete astronomical X-ray source (an X-ray star) located in the constellation of Cygnus.
Proper noun
- A placename.
- (astronomy, physics) The first generally accepted and confirmed black hole. A black hole in a high-mass X-ray binary (HMXB) with a blue supergiant companion (HD 226868), located in the constellation Cygnus.
- (astronomy, physics) The high-mass X-ray binary star system containing this black hole and blue supergiant star.
Synonyms
- Cyg X-1 (abbreviation)
Derived terms
- Cyg X-1 (abbreviation)