I was thinking of a scenario where the sun suddenly disappeared into thin space as if it were blinked out of existence. Aside from this being an absurd possibility, the more interesting question is how space around the sun would react to the giant loss of mass. Would it be correct in thinking that Mercury would fly out of its orbit around the sun before the earth flew out of its orbit? Since no force exceeds the speed of light C, gravity is still subject to propogate outwards from the sun towards the planets at a speed of C. The sun would stop emitting gravity waves and these gravity waves would no longer reach the planets and one by one the planets would be slung off into space in whatever random vector they were travelling at minus the influence of the sun's gravitational waves. What would these waves be like? Would dissappearance of the waves give a planet like earth a instant jolt into its random vector into space or would it be somewhat smooth? Are there any good analogies that can describe how the interaction between a planet and ?