Thirty-five years ago, the Hubble Space Telescope was launched into orbit. It's been sending back galactic data and images ...

While considered a mathematical possibility for many years, the first black hole wasn’t discovered until Cygnus X-1 in 1971. We now know that black holes occur frequently throughout the universe.

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 ...

The breakthrough offers new insights into the feeding mechanisms of black holes, from stellar-mass systems like Cygnus X-1 to ...

the Hubble Space Telescope has transmitted endless streams of magnificent images, confirmed the existence of "dark matter," and helped track a vagabond black hole moving through the Milky Way.