Under special relativity, the laws of physics are conserved under translation and Lorentz transformations. There is no privileged position, orientation, or velocity. You could argue that we can’t prove that there isn’t a specific reference frame that’s fundamentally true and that it doesn’t just happen to be a specific one you think is cool, but that’s almost certainly false.
Under general relativity, the laws of physics are conserved under continuously differentiable functions so long as the spacetime metric is altered accordingly. You can’t stick cartesian coordinates in space in a sensible way no matter what, so there’s no niceness to preserve. You could pick a reference frame (or whatever they call the general relativity version) where the Earth is in the center and not rotating, and you can’t prove that that reference frame isn’t fundamental. If you built a computer model of the universe, you could set that as the reference frame and you wouldn’t need to add code to make sure it works like you’d have to with special relativity. But even if there really is some fundamentally true point of reference, which isn’t necessarily true, it’s not going to happen to be that one.
Under special relativity, the laws of physics are conserved under translation and Lorentz transformations. There is no privileged position, orientation, or velocity. You could argue that we can’t prove that there isn’t a specific reference frame that’s fundamentally true and that it doesn’t just happen to be a specific one you think is cool, but that’s almost certainly false.
Under general relativity, the laws of physics are conserved under continuously differentiable functions so long as the spacetime metric is altered accordingly. You can’t stick cartesian coordinates in space in a sensible way no matter what, so there’s no niceness to preserve. You could pick a reference frame (or whatever they call the general relativity version) where the Earth is in the center and not rotating, and you can’t prove that that reference frame isn’t fundamental. If you built a computer model of the universe, you could set that as the reference frame and you wouldn’t need to add code to make sure it works like you’d have to with special relativity. But even if there really is some fundamentally true point of reference, which isn’t necessarily true, it’s not going to happen to be that one.