Hasslein, does gravity travel faster than the speed of light?
Gravity does not appear to travel faster than light, as a force and a constant, gravity appears to travel exactly at the speed of light. Einstein postulated a relativistic equation for gravity that was based on general relativity demands that the force of gravity travels at the speed of light, otherwise the predictions we achieve for the phenomena of light bending and the precession of the perihelion of the planet Mercury would be very different than what we have experimentally determined to be true. As you know, we can send spacecraft on very long journeys through the solar system, and soon even beyond the solar system to other stars. As these spacecraft accelerate away, often at high percentages of the speed of light, the distance between the Earth and these spacecraft will become very great indeed. So great will the distances be that the time it takes for light traveling between Earth and the spacecraft will be measured in hours, days, weeks, or even months. If gravity traveled at a
