I got off on a tangent (about the speed of light) in an earlier response to this. What I had intended to get at, is what has always seemed strange to me:
When I hear, "Big Bang", or whatever other description they have for it, the expansion is said to be from a single point in space, (yet, they talk about there wasn't really space at that point, nor time 'before' that, etc.) but whatever, when I hear other things they say, I hear them talk as if it happened 'over there a ways', and intuitively, I think, "There is material also going that direction, and at angles compared to us, up-down-left-right". When I drop a stone in the dust, I can see where the stone hit, even if I don't see the stone itself, by the directions the dust goes. When I see an explosion, I see where the center of the damage is by the ejecta flying off. Admittedly, I don't comprehend the fancy talk, about how there were no dimensions or whatever they say there. I have pretty well given up trying to understand.
My question is: Why can't we tell where it happened, and how close we are to that spot, and what direction objects are traveling relative to that spot, by observation? (I can easily understand why something ejected at above half the speed of light going the opposite direction from what we are going at above half the speed of light is, relative to us, departing at more than the speed of light, and thus, invisible to us. I can speculate, too, that in the small amount of time we have been able to observe and measure arc, and compare one body with another, there may not have been enough motion at the huge distances we observe, to see something moving at, say, right angles to ourselves, sufficiently for numbers to be accumulated to show 'where they came from'.)