Kerr spacetime is a solution to the equations of general relativity that describes the gravitational field around a rotating black hole. It was discovered by mathematician Roy P. Kerr in 1963. Unlike non-rotating black holes, which are described by the Schwarzschild solution, Kerr black holes have an additional parameter that accounts for their angular momentum, leading to unique properties such as frame dragging. In Kerr spacetime, the geometry of space and time is affected by the rotation of the black hole, causing nearby objects to spiral inward. This solution is significant in astrophysics, as many black holes in the universe are believed to be rotating, influencing their formation and evolution.