I always wondered when they say as you approach a body having sufficiently high mass time slows down considerably
but is it possible that if I look at an object and that object were to move close to say a black hole as it nears the event horizon the speed of the escaping light should decrease...
I think the extreme case would be if the canonball dude remained kinda stationary for a relatively amount of time in space the twin on Earth would age much faster and hence they might be the same age or the Earth twin might be older due to gravity time relationship