That's why, when you get close enough to any massive object, including a black hole, you fall towards it. It's also why light can't escape a black hole: the sides of the valley are so steep that light isn't going fast enough to climb out.
A clock near a black hole will tick very slowly compared to one on Earth. One year near a black hole could mean 80 years on Earth, as you may have seen illustrated in the movieIn this way, black holes can be used to travel to the future. If you want to jump into the future of Earth, simply fly near a black hole and then return to Earth.
This creates a natural time machine. If you could somehow get onto the loop, which physicists call a closed timelike curve, you would find yourself on a trajectory through space that starts in the future and ends in the past. Second, you'd probably have to cross the event horizon to get into the loop. This means that to get out of the loop at a particular time in the past, you'd need to exit the event horizon. That means travelling faster than light, which we're pretty sure is impossible.". Sounds delicious, right?
Well in that case then, earth is a time machine. Mass causes time to bend. Did you know your watch will turn quicker the further you are away from earth? It's also what causes gravity... Thank you, I'm hear every Wednesday
No, time isn't real, it's a measure of change. Change is real.
We could safely say that they are time machines ie your time alive is over if you get near one!