According to Einstein's theory of general relativity, the force of gravity is not instantaneous in its effect on objects. Instead, it propagates at the speed of light. This means that if an object were to suddenly disappear, its gravitational field would not immediately disappear but would continue to exist for a period of time before eventually dissipating. The speed at which the gravitational field propagates is the same as the speed of light, which is approximately 299,792,458 meters per second. This means that if an object were to suddenly disappear, its gravitational field would remain in place for approximately 8 minutes and 20 seconds before completely disappearing.