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Even if the Earth is mot the actual center of everything, expansion coupled with acceleration and the speed of light would mean that we *must* be at the center of the observable universe. The only way we could not be in the center of the observable universe is if physics didn't work the way we are taught.
Line of thought:
If space is expanding, then objects further away are moving away faster than object closer.
You cannot see light from a space moving away from you faster than the speed of light.
The first two mean there is a distance from you where objects exist but you cannot observe.
This distance occurs at about the same distance regardless of direction.
This space forms a sphere with us at the center.
Therefore we must be at the center of the observeable universe.
:aka_shrug: