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Meaning of Cygnus X-1 | Babel Free

Noun CEFR B2

Definitions

A placename.
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.
The high-mass X-ray binary star system containing this black hole and blue supergiant star.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

Cygwin cyhalothrin cyheptamide cyhexatin CyI cyka