An artist’s impression of the Cygnus X-1 system, with the black hole appearing in the center and its companion star on the left. New measurements from Cygnus X-1, reported Nov. 3 in the journal ...

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. When you purchase through links on our site, we ...

Researchers’ recent observations of a stellar-mass black hole called Cygnus X-1 reveal new details about the configuration of extremely hot matter in the region immediately surrounding the black hole.

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of the black hole binary system Cygnus X-3 compact object likely a black hole and ...

CC0 Usage Conditions ApplyClick for more information. Astronomers are confident the Cygnus X-1 system contains a black hole, and with these latest studies they have remarkably precise values of its ...