this post was submitted on 27 Apr 2025
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[–] [email protected] 19 points 1 day ago (2 children)

I think that if space itself is what is rotating, then speed of light limit does not apply. But if it's everything in the universe orbiting, as it were, a central point, then it would.

But if it is space itself rotating, then that would suggest some objective frame of reference outside the universe. Wouldn't it?

[–] [email protected] 2 points 17 hours ago (1 children)

But if it is space itself rotating, then that would suggest some objective frame of reference outside the universe. Wouldn't it?

Not necessarily. Just like space is growing without the need for an objective outside frame of reference, it could be rotating - the rotation is just relative to itself.

[–] [email protected] 1 points 16 hours ago (1 children)

I don't think something can rotate relevant to itself. If all of reality was the earth, and nothing else, how can you tell if it's spinning or not?

Please use small words if you try to answer this. I know a decent bit of applied physics, but once it turns to pure math, my head starts to swim.

[–] [email protected] 1 points 16 hours ago

Stuff could move around differently. Rotations have many effects, e.g. rotation curves (the closer you are to the center of the rotation, the faster you go). We could still figure out that the earth is rotating by measuring the effects a rotation has.

[–] [email protected] 4 points 1 day ago* (last edited 1 day ago)