On time

Wouldn't it be nice if you could see in the past? Anywhere you would want to look?

I think i might have an interesting theory about that, but it depends strongly on the assumption that, given an empty universe in which two bodies (stars or whatever) are introduced, these two bodies would immediately begin to act and react on each other, as if the information about the physical states of the two, like gravitional pull, were swapped instantaneously.

I do however not have a universe at my disposal, nor do i own two considerable masses to tinker with. I fear that the speed of light also binds this theory, but if there is anybody out there who knows that this is not the case, i might have some theory about how we could take a snapshot of yesterday.

Please respond...