Yep, "the force just is". We don't know why, we just know that it is, and that it obeys Einstein's equation. But the equation does answer the "how".

And on further thought, as far as energy is concerned in the warping of space, we need to remember that matter is energy. That then raises a question. Does matter cause the warp in space? Or does the warp in space cause matter? As I understand GR a warpage in spacetime always accompanies matter. But I don't know that there is a way to separate matter and spacetime and say that one is the "real" part or if they are just different ways of looking at the same thing.

Just one more thing to confuse the issue a little bit.

Bill Gill


C is not the speed of light in a vacuum.
C is the universal speed limit.