Not sure why this was posted, but this is a concept from Newton that we know to be an oversimplification.
I clicked through because I was interested to see if there was some new argument for absolute space, which would contradict our current understanding (unlikely). It was not, however. Instead it was a nuance of Newton's arguments for his basis of absolute space.
Geodesics in spacetime address the nature of motion through space and time.
The speeds involved are not relativistic, so this isn't a matter of special or general relativity. Except, of course, one needs to explain the conservation of momentum relative to the universe. Noether said that's because space is isotropic.