In their own frames with a differing velocities with respect to the Gamma function would be the same depending on their velocities that they had traveled from the Earth, Meaning once Gamma was taken in account they would all match up if another frame of reference was taken such as a star or Mars or something, though all 4 spaceships would have a different time passed depending on their velocity, once taken across the gamma function and a new object's gamma function they would all align to be the same time passed for that object.
Such a simple scene, but the explanation is so difficult to understand. Use more assumptions to make up for the loopholes caused by previous assumptions.
If Newton's classical physics can't explain these phenomena, I will try to believe these hypotheses, but classical physics can completely explain the Morley experiment, light bending, derivation of mass energy equation and so on. Moreover, Einstein himself disagreed with the fact that the speed of light does not change, and the special theory of relativity based on this assumption can imagine how incorrect it is.
Edited by TonyYuan2020, 13 March 2020 - 11:12 PM.