(This is just a hypothesis which can be totally wrong) I will combine three ideas here: The equivalenceprinciple Gravitational timedilation Special theory of relativity The equivalenceprinciple says that a gravitational force on a system is indistinguishable from an acceleration of that system. Whether you are on Earth or you are accelerating in a spaceship with 1 g, there is no way to tell the difference. (general theory of relativity) So, the equivalenceprinciple must tell us: (I'm sorry for my bad English) The decreasing timeflow of a body with a constant acceleration of x g in respect to the timeflow of a body at rest is equivalent with the decreasing timeflow of a massive body with a gravitational field of x g in respect to uncurved spacetime with zero gravity (f.e. intergalactic space). To simplify the idea: Accelleration versus being at rest = gravity versus zero gravity (intergalactic space f.e.) We all know that a clock in the spacehip of lower orbit (hence in a region of stronger gravity) runs more slowly then a clock in the other ship. (gravitational timedilation). So a prediction can be: If we had a telescope to see a hypothetical clock in intergalactic space we would see it ticking faster and faster and faster to infinity. If we were in intergalactic space and would see through a telescope, we would see a clock on Earth ticking slower and slower and slower to infinity. Thank you for the intresting feedback.