Astronomers have reportedly made a historic first measurement of a black hole's recoil, also described as a "kick", after a cosmic collision. The black hole is said to be moving at a significant speed, with one account suggesting it is crossing the galaxy at nearly 620 miles per second. However, the nature of the observation is somewhat unclear, with some reports focusing on the measurement of the black hole's motion and others mentioning the detection of a strange signal in gravitational waves.