The star system is location in the Telescopium constellation.
The black hole’s two bright companion stars helped astronomers pinpoint the black hole’s location.
The two companion stars can been seen with the naked eye in the southern hemisphere,. “We were totally surprised when we realized that this is the first stellar system with a black hole that can be seen with the unaided eye.”
Scientists noted that one of the stars was rotating around an invisible object every 40 days. This led scientists to recognize they were seeing a triple star system that included the two stars and the black hole.
The observation was made using the MPG/ESO 2.2-meter telescope at the European Southern Observatory’s La Silla Observatory in Chile.