Cygnus X-1 en · PROPN
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.
Meanings
- 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.
- A placename. ▸ The high-mass X-ray binary star system containing this black hole and blue supergiant star.