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 ...

Using ESA's INTEGRAL spacecraft, astronomers have detected exceptionally bright X-ray flares from the Cygnus X-1 X-ray binary system. This is the first time that such strong flaring activity has been ...

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 ...

Cygnus X-1 jets emit energy equal to 10,000 Suns, study finds Jets travel at half the speed of light, about 150,000 km/sec 10% of energy from infalling matter is carried away by jets How powerful are ...

Using the Hard X-ray Modulation Telescope (HXMT), astronomers from Shanghai Astronomical Observatory in China have detected a low frequency, quasi-periodic oscillation in a black hole high mass X-ray ...

More than 60 years after it was first spotted, Cygnus X-1 — the first confirmed black hole — is still full of surprises. Researchers have finally measured the energy output of this behemoth's "dancing ...

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 ...

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 ...