Cygnus X-1

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English[edit]

English Wikipedia has an article on:
Wikipedia

Etymology[edit]

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[edit]

Cygnus X-1

  1. A placename.
    1. (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.
    2. (astronomy, physics) The high-mass X-ray binary star system containing this black hole and blue supergiant star.

Synonyms[edit]

Derived terms[edit]

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