Joined: June 2006
|Re "Gravity - it's just a theory"|
Technically though, isn't it general relativity that's "just" a theory, with gravity being the thing it attempts to explain?
I would say that general relativity recharacterizes gravity, due to limitations of the speed of light. Gravity becomes warps in space time, in which light and mass are affected. Newton's laws are, in essence, a subset of gen rel; as massive, low speed solutions. (As a side note: Gen Rel shows up in String Theory as low-energy solutions)