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This year marks the 100th anniversary of Einstein's General Theory ofRelativity (1915-2015). The first nontrivial solution of the Einstein fieldequations was derived by Karl Schwarzschild in 1916. This Note will focusmainly on the Schwarzschild solution and the remarkable developments which itinspired, the most dramatic being the prediction of black holes. Laterextensions of Schwarzschild's spacetime structure has led to even wilderconjectures, such as white holes and passages to other universes. Penrosediagrams are introduced as compact representations of extended spacetimestructures. Stephen Hawking's derivations of quantum effects in black holesmight provide clues to an eventual "Theory of Everything" encompassing bothgeneral relativity and quantum mechanics.

Centennial of General Relativity (1915-2015); The Schwarzschild Solution and Black Holes