Gravitational waves stretch and squeeze the fabric of space and time itself. When space/time is squeezed, pulsar pulses ...

"We would need to consider the possibility that the source was created (or trapped as a primordial black hole) by a highly ...

In fact, these strong X-ray emissions led to the discovery of the first black hole, Cygnus X-1 in the constellation Cygnus, in 1964. If all this sounds like science fiction, read on.

A tiny fraction of known black holes emit X-ray signals that resemble a human "heartbeat." Now, new research may finally explain the strange phenomenon.

An illustration of the black hole Cygnus X-1, the first ever glimpsed by astronomers. The stellar-mass black hole (right) siphons gas from its companion, a blue supergiant star (left).

The first black hole to be confirmed was Cygnus X-1, the brightest X-ray source in the Cygnus constellation. Since then, about 50 black holes have been discovered in systems where a normal star ...

The black hole in Cygnus X-1 is 20 times heavier than the Sun, and has a companion - a heavy supergiant star (40 times more massive than the Sun) in a binary system.

India’s space telescope AstroSat has measured X-ray polarisation from the Cygnus X-1 black hole, the first time that such a feat has been accomplished, opening new possibilities in the study of the ...

That explains — kind of — how Liu Kang can teleport to outer space, create a black hole by snapping his fingers, and turn Sub-Zero into a gore noodle in his (second) Mortal Kombat 1 Fatality.

WHAT’S NEW — In 1971, Cygnus X-1 became the first black hole to be observed from Earth. While black holes had long been predicted theoretically, Cygnus X-1 became the first to be positively ...