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They say the quantum vacuum is Lorentz invariant.. you can't locate it at any place.. but if spacetime manifold is also Lorentz invariant and you can't locate it at any place.. how come the earth can curve the spacetime around the earth and not some exoplanet light years away.

And if spacetime is not Lorentz invariant like vacuum, then what are the limited invariance it obeys and how do you make it Lorentz invariant?