Im having a hard time understanding gravitational time dilation. I have two examples I've heard(from shows on the science channel): a theoretical experiment is you leave earth in a space ship and orbit outside the event horizon of a black hole for 1 year, its possible that when you come back to earth its been 10 years or even 100 years on earth when its been only 1 year for you. This shows that as gravity increases time slows down for the person next to the black hole because of the black holes large mass? But this contradicts the fact that when astronauts orbit the earth in the space station they are technically, however small the measurement, younger than us on earth, so they age slower? Because the farther away from earth you are the less stronger gravity is? So this is saying that the less gravity the more time slows, which contradicts the black hole experiment that says more gravity has this effect on time. Can someone please explain this relationship.