So far as I understand it, mass/energy causes gravity, and gravity results in time dilation. Does anyone know of a theory that views mass/energy as causing time dilation, and the differences in time are what causes gravity?
This kind of question gets asked a lot here, and the answer is that science doesn't really deal with this kind of 'why' questions. As far as our best (in terms of predictive power) theory is concerned, gravity is caused simply by mass/energy. Why is it that way? Just is. Someone might come along with another more powerful theory, which will say gravity is caused by X, but again there will be no answer as to why. It's a general feature of physical theories that they simply describe, or model, the world rather than attempt to answer deep why questions. Fundamentally, it comes from the fact that physical theories always rest on assumptions (axioms) which cannot be proven from any (known) simpler axioms. One can imagine reducing and reducing the system until everything is derived from a small number of axioms, but I doubt these would be very intuitive. At this point, the only thing to assuage feelings that science is ultimately guesswork is to note that these axioms give results that are in agreement with what we observe in nature.Funny for sure, I've definitely heard of General Relativity. My question is more towards the 'why' there is gravity, rather than describing it with equations.