We had a thread in which we were discussing run-away gravity. We didn’t really reach a conclusion, and the thread drifted to a point far from gravity. Rather than try to resurrect that thread, I am proposing this as a possible conclusion, and would be interested to know if it makes sense to others.
If M is the original mass/energy that creates gravity,
And G is the gravity (curvature) created by M,
Then, although G carries energy, the total mass/energy of M + G cannot be greater than the original mass/energy of M, because the energy contained in G does not appear from nowhere.
We might continue this line of thought by saying that the energy in G gives rise to more gravity (G2), but the total still remains the same: the mass/energy of M + G1 + G2cannot be greater than the mass/energy of M.
There is, therefore, no run-away gravity.
