If our entire universe was moved 8 metres to the left would anyone notice?
If your cup of coffee was moved you would definitely know about it. If the entire solar system were moved you might feel it but what if the entire universe slid sideways?
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No one would know because there is no stable non-moving point of reference. And the universe is constantly expanding so we’ve moved farther than that between that moment.
And this one.
@JLoon I’m hoping to extend my garden.
@kritiper Isn’t the expansion of the universe different as no point in space is actually moving. It’s as if all the other points in space are moving away from us?
Everything is moving away from us as we are moving away from them. It is relative.
A point in the empty vacuum of space can’t be stable/stationary because nothing is there. How could it be identified? How could you know exactly where it was?
Moving 8 meters (excuse me… 8 metres…) is simultaniously insignifficant and jarring. If everything moves, there would be no way to tell.
The Milky Way galaxy and Andromeda galaxies are on a collision course approaching each other at 110 km/sec. Link It does not make sense to say that we are standing still while Andromeda is coming after us. Part of that 110 km/sec must be due tp the motion of our galaxy, yet in our daily lives we have no feel for it.
How do you know it hasn’t?
That depends on what you mean by universe.
If you mean everything piece of matter and energy in it moves, then I think yes, you would notice the inertia.
If you mean the spacetime itself, then probably not.
If it is even possible at all, since it is unknown if the universe itself occupies some higher dimensional hyperspace.
If not, then there is no “space” to move it around in.
Eight meter’s no, but nine then absolutely.
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