Does the force of gravity travel the speed of light? faster than the speed of light? or is it instantaneous? Is there a distinction between propagating gravity waves and the force itself? If gravity travels the speed of light, it could not escape a black hole, because the escape velocity is faster than light. So gravity must be faster. If gravity is faster than light, but finite, wouldn't there exist an event horizon through which gravity could not escape? Depending on the speed of gravity and the density to which matter can compress, could there exist a "gravity hole" that would be undetectable (because no light or gravity can escape) unless it happens to directly collide with something. And would "red-shifted" gravity waves exist as well, due to a high gravity environment or the expansion of space? One more musing: Do the other forces of nature have speeds, such as the electric, strong, and weak forces?