Caption 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 ...

It's through this process that astronomers first identified black holes with the famous case of Cygnus X-1, one of the brightest sources of X-rays in our sky. In the midst of this feeding frenzy ...

What Was the First Black Hole Ever Discovered? The first accepted black hole was Cygnus X-1. Discovered during a 1971 rocket ...

This makes BH3 the largest known stellar-mass black hole in the Milky Way, supplanting the previous record holder, Cygnus X-1 ...

Abstract: The spectra of black hole binaries in the low ... regions contributing to the hard X-rays in addition to a cool disc component. We show this explicitly for some of the best RXTE data from ...

XRISM allowed astronomers to track plasma as it circled the supermassive black hole at a distance of around 0.1 light-years ...

Working off of Albert Einstein’s theory of gravity, the Australian physicist Ludwig Flamm suggested that a spacetime conduit could connect one side of a hole to the other. While black holes suck ...

The first results from JAXA's XRISM X-ray telescope are out, and they reveal new features of the superheated gas around a ...