What Is The Biggest Black Hole In The Universe?
What Is The Biggest Black Hole In The Universe? Cygnus X-1 is the heaviest stellar black hole observed without using gravitational waves. The famed Cygnus X-1 black hole (illustrated, slurping mass off its companion star) is nearly 1.5 times as massive as astronomers thought, new observations suggest. Is there a black hole bigger than Ton