... it, not even light. Everything that passes through the event horizon is gone from the observable universe. A black hole is a region where matter collapses to infinite density, and where, as a result, the curvature of spacetime is extreme. Event horizon The event horizon defines the boundary of a black hole behind which nothing, not even light, can escape. Consider an event (a ... An object whose density is infinite. Gravitational Waves [site] Predicted in Einstein's General Theory of Relativity. Gravitational waves are disturbances in the curvature of spacetime caused by the motions of m...

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