This is similar to the thought experiment: if you are in a spaceship with no windows, are you accelerating, or stationary on a planet with gravity; you can’t te

This is similar to the thought experiment: if you are in a spaceship with no windows, are you accelerating, or stationary on a planet with gravity; you can’t tell. Though if you are constantly a accelerating, with the earth stopping you, what is your instantaneous speed? The faster you go, the more time dilation.