Weighing in at roughly 21 solar masses, the black hole in the X-ray binary system Cygnus X-1 is so massive that it challenges current stellar evolution models, a new study reveals.

Cygnus X-1 is one the closest black holes to Earth and was initially discovered in 1964. The massive black hole was discovered when a sub-orbital rocket was launched from New Mexico with a pair of ...

Accretion geometry of the black-hole binary Cygnus X-1 from X-ray polarimetry. Nature Astronomy , 2018; 2 (8): 652 DOI: 10.1038/s41550-018-0489-x Cite This Page : ...

Birth of famous black hole: Longstanding mysteries about object called Cygnus X-1 unraveled. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2011 / 11 / 111117144045.htm ...

Cygnus X-1 (also called Cyg X-1) is one of the most famous black holes in our galaxy. It is the first source that astronomers could agree was a black hole, and the subject of a well-known 1974 bet ...

Cygnus X-1’s claim to fame is that it was the first candidate black hole. In December 1974, two famous theoretical astrophysicists, Stephen Hawking and Kip Thorne, bet each other magazine ...

Cygnus X-1 is a black hole feeding off its nearby binary companion, a young blue supergiant star. (Credit: NASA/CXC/M.Weiss) Discovered in the early 1960s by rocket-borne X-ray detectors, Cygnus X-1 ...

New observations of its distance from Earth have shown that Cygnus X-1, the first black hole ever discovered, is much more massive than previously estimated. In fact, it's the most massive black ...

The Cygnus X-1 system is home to one of the world’s most famous black holes. It was the first-ever black hole detected and has become one of the most studied objects of its type.

Cygnus X-1, one of the first identified black holes, is much weightier than expected, raising new questions about how such objects form. Skip to content Skip to site index Science ...

WASHINGTON, Feb 18 (Reuters) - A fresh examination has revealed new details about the first black hole ever detected - which was spotted in 1964 and became the subject of a friendly wager between ...