Just saw yet another discusssion of "spacetime" which always gets my goat, because to the average ignoramous like myself, space and time outside the context of stuff has no meaning.
The density of gravity particles near a black hole is much greater than not near a black hole, so there's less room for other stuff.
What happens to an object traveling at very high speed that gets too close to say, Jupiter? It breaks apart. Perhaps what once was our little universe particle got to close to something much more massive and did so at incredible speed.
Well, I think the discussion is in different terms than what you might be thinking of. This is how I understand it, anyway:
* Space affects the objects in it and vice versa
* It is not supposed to be some static rubber sheet; otherwise there would be a preferred frame of reference
* The conjugation with time is an effect of holding light speed constant for all observers and assigning gravity to a geometry of space
* In "spacetime", your velocity is always constant, but it's a four-part vector (x, y, z, time)
* Higher slopes in the geometry of space shift the magnitude of the space vector (x, y, z) and into the time vector
* That interdependence leads to them calling it "spacetime"
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