Karl Schwarzschild

Karl Schwarzschild was a German physicist and astronomer who made a significant contribution to Einstein's theory of General Relativity. In 1916, he derived the first exact solution to Einstein's field equations, leading to the concept of the Schwarzschild radius. This radius defines the boundary around a black hole, beyond which nothing can escape its gravitational pull. His work helped deepen our understanding of black holes and the behavior of space and time around massive objects. The Schwarzschild solution remains fundamental in astrophysics, influencing studies of gravitational fields and the nature of the universe.