The relativity problem is already solved. If it weren't GPS wouldn't work. It's somewhat complex, but it basically boils down to defining the Earth as the prefe

The relativity problem is already solved. If it weren't GPS wouldn't work. It's somewhat complex, but it basically boils down to defining the Earth as the preferred reference frame (Earth Centered Inertial System, or ECI) and doing the necessary transforms[1]. [1] https://apps.dtic.mil/sti/pdfs/ADA516975.pdf https://apps.dtic.mil/sti/pdfs/ADA516975.pdf