How to Measure the Gravity of the Universe

We don't know if the universe is finite or infinite right? We certainly don't. The universe could be infinite could go on forever or it could also be finite. A part of the universe that we can see what we call the observable universe is just the part where light has had time to get to us from those far reaches. Beyond that we literally can't see because even though it might exist and photons from it could be racing through space to reach us it hasn't arrived yet.