Gravitational physicists explore the implications of the general theory of relativity, in which gravitation is a consequence of the curvature of space and time. This curvature thus controls the motion of inertial objects. Modern research in gravitational physics includes studying applications of numerical relativity, black hole dynamics, sources of gravitational radiation, critical phenomena in gravitational collapse, the initial value problem of general relativity, and relativistic astrophysics. Research in gravitational physics is currently being conducted in JILA.