[Southack]

If E=MC^2, and if Gravity (G) is equal to the Energy of a Mass (i.e. G=E/M), then G=C^2.

"Except that it isn't, unless you can explain in good detail how you managed to pull that novel assertion out of your hind end, *and* provide sufficient evidence for it." - Dan Day

There are really only two possibilities being discussed here:

1. That G = C^2
2. That G = C

I.e. either Gravity travels at the speed of light (C) or else it travels at the speed of light squared (C^2).

Now, given the two above assumptions, lets work with one equation with which neither of us will argue, that E=MC^2.

Now, this means that our two above possibilities would work out to this by substituting the two possible values for G:

Postulate 1. E=MG ---> Where G=C^2
Postulate 2. E=MCG ---> Where G=C

Fair enough. Are you with me so far?

Now, if postulate #1 is correct, then G = C^2 = E/M.

If postulate #2 is correct, then G = E/(MC) = C.

[Lurking Libertarian]

There are really only two possibilities being discussed here:
1. That G = C^2
2. That G = C
I.e. either Gravity travels at the speed of light (C) or else it travels at the speed of light squared (C^2).

Southack, I'm no physicist, but I think you're misinterpreting "=". "G=C" doesn't mean that "gravity travels at the speed of light" but rather that "in any equation, C can be substituted for G without changing the result."

I'm pinging a real physicist to correct me if I'm wrong.