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 ...

The band's classic multi-movement opus "Cygnus X-1" took on all comers in our Rock Star Wars tournament, soaring through our carefully arranged series of intergalactic battles between 32 space ...

We now know Cygnus X-1 contains a black hole and a star in a binary system. The star is also classified as the variable star V1357 Cygni, a hot supergiant (think Rigel) with an O9.7 spectral ...

Rush's 'Cygnus X-1' faces Creedence Clearwater Revival's 'It Came Out of the Sky' in the next round of our Rock Star Wars.

Cygnus X-1 began as a star that was approximately 60 times the sun's mass that collapsed tens of thousands of years ago.

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 ...

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.

To resolve the black hole, they used the Event Horizon Telescope, a global radio telescope array with an effective aperture the size of the Earth. One participating EHT telescope, highlighted here, is ...

An animation showing the Cygnus X-1 system, consisting of a black hole in orbit with a giant star. Recent observations by radio telescopes have found the system is 20 per cent further away than ...

In this case, the polarization of X-rays IXPE picked up from Cygnus X-1 indicate two things about the shape of the plasma spiraling into the black hole.

Using several telescopes, both ground-based and in orbit, the scientists unravelled longstanding mysteries about the object called Cygnus X-1, a famous binary-star system discovered to be strongly ...