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Nothing is Everything.If we assume the space is expanding as well, then we're expanding into nothing.
What is "nothing"?
Yes, only space is expanding, not matter.If everything were expanding at the same rate, including your measuring rods, then you would not detect any expansion.
Universe doubles from 1 to 2 units. Measuring rod doubles from 1 to 2 units
Universe still measures the same number of rods.
If we were expanding like the Universe, we would not be able to detect expansion.
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How else it would be?How about "space is only expanding relative to time"?
But into what does that second 3D space expand into?3D space is assumed to be expanding into 3D space (not nothing) already created at the BB event.
Something like having 2 mirrors facing each other?3D space is not expanding into nothing, just more 3D space according to BB cosmology.
TautomericHow else it would be?
If there is expansion without time factor the either:
A) Expansion is already fully and instantly complete and finished
B) There is no expansion, it didn't take place at all
Given my signature,If time expands such that it accelerates or slows down over time, then this may answer why universe expansion is accelerating instead of expanding at a constant rate?
Good question!assuming time varies universally, why wouldn't our own clocks be affected so that we would have no way of knowing changes to time?
Agree, I have difficulties choosing appropriate words because English isn't my first lang.A clock or watch isn’t a time measuring device but a simulation if it.
According to this analogy, your opinion is that change in time should not affect clocks?A 1 meter ruler won’t change its apparent length if all space, say, doubles in size instantly
Right, that's the correct question to ask, but I can't imagine what physics would be dependent on any rate of time. We all seem to just go with the flow, so any increase or decrease wouldn't be perceptible, AFAIK.However, what if change in the speed of time affects physics?
Helio, with respect, I don't believe "Right, that's the correct question to ask".Right, that's the correct question to ask, but I can't imagine what physics would be dependent on any rate of time. We all seem to just go with the flow, so any increase or decrease wouldn't be perceptible, AFAIK.