Since its discovery 45 years ago, Cygnus X-1 has been one of the most intensively studied cosmic X-ray sources. About a decade after its discovery, Cygnus X-1 secured a place in the history of ...

New observations have shown that Cygnus X-1, the first black hole ever discovered, is much more massive than previously estimated. By making a more precise measurement of its distance from the Earth, ...

A black hole on a list of the best deep-sky targets? That sounds like an oxymoron! But for the observer who likes to track down the unusual, this is an ideal target. In a telescope, Cygnus X-1 looks ...

Perhaps nothing symbolizes the terror and wonder of space more than a black hole. The first-ever photo of a black hole, taken in 2019, offered a glimpse of a dark ...

Discovered in the early 1960s by rocket-borne X-ray detectors, Cygnus X-1 is a binary system containing a supergiant star and a stellar-mass black hole. That black hole is both accreting matter — ...

In an international collaboration between Japan and Sweden, scientists clarified how gravity affects the shape of matter near the black hole in binary system Cygnus X-1. Their findings, which were ...

The image below is an artist's impression of the Cygnus X-1 system, which contains the most massive stellar-mass black hole we have ever detected without the use of gravitational waves. The massive ...

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. Ultimately, the ...

As matter swirls violently down toward the event horizon of a black hole, it forms an accretion disk, heating plasma to millions of degrees and blasting X-rays into space. But what exactly does the ...

Astronomers might need to adjust their expectations for black holes. According to the New York Times, an international research team has determined that Cygnus X-1, one of the first discovered black ...

To strive for the most complete understanding of a black hole, astronomers have turned their telescopes to the double-star system Cygnus X-1, which boasts the first of these discovered oddities. The ...