Geometry on Curved Surfaces

When space is curved by gravity, you're actually moving a straight line around these surfaces and that creates this sort of force. Einstein famously said that nothing can go at an infinite speed. In fact, there is a speed limit in our universe and that is the speed of light. And gravity also appears to propagate through space time at the speed oflight. But modern physicists are not totally sure that that gravity does go at theSpeed of light.