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This kind of brings up another point that is interesting about our universe. We're under the impression that every point in the universe is experiencing the sam
by ianai 4y ago
This kind of brings up another point that is interesting about our universe. We're under the impression that every point in the universe is experiencing the same amount of distance from the beginning of the universe from that individual point's frame of reference. But this kind of makes time so fundamentally weird compared to the spacial dimensions. We assume no point in the universe is the center, for instance. And the topology of the universe would look fundamentally different if there were some spacial coordinate (of the three) upon which every point was "pinned." But isn't saying from every individual point's frame of reference the universe is the same age equivalent to making a central point within time at the beginning? aka the big bang, of course, but that also seems to imply something about the topology of the universe for eternity after the big bang, as well. It's got one complicated topology for sure.
- BurningFrog 4y agoYeah, the time dimension is different from the space dimensions. To mention the obvious: everything is constantly moving through the time dimension together, for unknown reasons. Nothing like that happens with space.
- ianai 4y agoThere was some ancient religion where their god or satan figure was responsible for time - literally the god/satan beings way of destroying the universe. Wish we could figure out some better ways to experiment with time. Seems like it's very telling of what's really going on that it's so different.
- cmehdy 4y agoBut how would we know if all spatial dimensions were moving along a constant vector? We can't rely on redshit/blueshift if the medium of transmission itself is moving like everything else. The next question might be "moving in what, then?" but then why not abstractly ask the same about time.
- smolder 4y agoThis is a bit of a tangent, but the idea of "moving through time" always struck me as a little weird, because the concept of motion is dependent on time already. I like to think of things having a shape that exists along the time axis in addition to the spacial ones. The 4D shape of a thing is fixed, but captures within itself what we perceive as motion in 3D space.