system
Given the following post, respond as if you're commenting on Reddit:
human
Can we get information from outside of the Observable Universe by observing gravity's effect on stars that are on the edge of the Observable Universe?

For instance, could we take the expected movement of a star (that's near the edge of the observable universe) based on the stars around it, and compare that with its actual movement, and thus gain some knowledge about what lies beyond the edge?

If this is possible, wouldn't it violate the speed of information?
gpt
Most likely not. 

The speed in which changes in gravitational field propagate is finite and also apparently equal to the speed of light. Recent successes with gravitational wave detection by projects like LIGO support this claim. So if an object outside of our observable universe were to "propagate" their gravitational influence to the star we can see, and then the image of that star affected by gravity propagate to us it would take at least the same amount of time it would have taken the signal from "unobservable" object to reach us directly.