Existence of orbiting black holes confirmed for 1st time
For the first time ever, astronomers have been able to observe and measure the orbital motion between two supermassive black holes in a 12-year study. With the measurements, scientists will be able to understand how black holes merge and form ripples in space-time called gravitational waves, researchers said. Gravitational waves were first confirmed in 2016, 100 years after Einstein's prediction.