Gravity effects time in such a way that you can visualize it on a scale such as: |-----|-----|-----|-----| <- Earth Scale in Seconds |-----------|-----------| <-Deep Space Scale in Seconds(Exaggerated) I'm trying to visualize how this time effect would effect everything, matter, speed, position, momentum... If an observer was able to see both points in space at the same time, and were to watch a race of two identically build rockets. The rocket on earth would finish before the rocket in space. Of course the experienced time would be the same and both rockets would agree on the amount of time it took, only the observer able to see both outcomes would know the difference. If you could bring this scale down on the small and measure the movement of a particle from one "Instant" to the next - literally from Future to Past on the smallest scale, would the uncertainly be different in space than on earth due to the gravitations effect on time? Basically what I am saying is, the "space" between the two measured units of time would be different: Past|----|Future on Earth Past|------------|Future in Space So if you were to measure a particles position, wouldn't the ability to accurately predict is position go down in space than on earth?