Unveiling Nearby Black Hole Dynamics

A classical black hole is, by definition, a spacetime region where gravity is so strong that nothing can escape from it. Thus the black hole has two defining features. One is the singularity which is a spacetime point with infinitely large curvatures. The

other is the event horizon which is a spacetime boundary precluding even light from escaping to infinity.The research on black holes began after the birth of Einstein' theory of gravitation, i.e. general relativity, although the idea of the "surface of no escape" can be dated back to the 18th century [1]. In 1916, Schwarzschild obtained the first exact vacuum solution of Einstein's equations with spherical symmetry. About half-century after Schwarzschild's discovery, Kerr discovered the exact solution for rotating black holes. Hawking's discovery of black hole evaporation stimulated a lot of debates of quantum unitarity against semiclassical gravity..