The 1st widely accepted black hole, Cygnus X-1, was discovered decades earlier in 1964. X-rays emitted were detected by a pair of Geiger counters launched on a sounding rocket from White Sands Missile Range in New Mexico. #BlackHoleFriday
Cygnus X-1, discovered in 1964, was the first cosmic object ever identified as containing a black hole. Now, NASA telescopes have teamed up to reveal new details about the configuration of hot matter surrounding this famous black hole.
