Now, I've taken Physics this year, and I am fully aware that gravity is a force that works by an inverse square law.
But, I want to know, is there ANY point at which gravity doesn't have an effect? Like, would adding a pinball to the centre of Andromeda and one to the centre of the Milky Way really have any effect? If they weren't added, but rather in a plane without any other matter, the same distance as what I stated above, would they REALLY have an effect at all?
Because, if you think about space like a sheet of paper or a blanket, yeah... it would bend around the pinballs, but the effect would end almost immediately after engulfing them. So, is there a, say "terminal distance" after which gravity between 2 objects ceases?