Giorgio wrote:GIThruster wrote:Hmm. . .not exactly sure what you're saying. All motion is relative to time. From what I remember reading the papers several years ago, the momentum that is found in the thruster, goes missing from the rest of the universe in such a way that it effects the far future--there's less momentum there. I can't venture much past that as I'm not a field theorist and this is really GR stuff. Best is read Jim's papers.
That can be very misleading.
Motion can be considered "over a time axe" or "within a time frame", but not "relative to time" if you want to invoke an exchange of momentum. That is becouse exchange of momentum with time is mathematically impossible to describe (at least at the best of my knowledge) unless you accept the idea that our universe splits every infinitesimal time to create an alternate universe with whom exchange momentum.
Okay. I'll take your word for it. I'm not really following the connection with other universes. I will admit here though, since you asked, to being a proponent of Loop Quantum Gravity, specifically because it proposes that like matter and energy, time and space are not infinitely divisible. In Loop theory, all motion is really more like dislocation. There is no smooth gliding form one position to another, but rather existence takes up residence in a loop at one instant, and in another loop at the next instant. It's more like film than video.
but now we're so far from the original question. . .