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Originally posted by LURCH
According to relativity, there is no difference between an orbitting Earth in a stationary universe and a stationary Earth with the universe rotating around it; they are the exact same situation viewed from two different frames of refference.
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Um, I don't think these accelerated (rotating) frames can be equated so simply via special relativity. And if you're thinking of the equivalence principle, remember that's only true in the limit; in extended frames tidal effects will easily detect which frame is moving. Note that Mercury, for example, revolves in the Schwartzschild geometry near the Sun, not the other way around.