Cygnus X-1

[ eks-wuhn ]

noun

, Astronomy.

1. a strong x-ray source in the constellation Cygnus, consisting of a binary system of which one component may be a black hole.

Example Sentences

The temperature of Cygnus X-1 from Hawking radiation is roughly a billionth of a degree above absolute zero.

From The Daily Beast

Lower-mass black holes, such as Cygnus X-1, are the remnants of very massive stars; those are a story for another day.

From The Daily Beast