User blog comment:ProfessorMcG/Time Travel. Is it possible?/@comment-1406709-20100812192306

What RvB means is that when you get closer to an object with more mass, time seems to slow down relativley for you, the farther you get from an object with high mass the faster times seems to go.

For example, say you have two astronauts orbiting in a spaceship right outside a black hole. One astronaut enters into the black hole, the one in the ship sees the person going into it get slower and slower until they almost stop completely. While for the other astronaut, times moves the same until they get so close that he gets caught in the massive gravity of the black hole and he is literally torn apart, atom by atom.