Originally Posted by oink
when I was a kid I absolutely LOVED Time Travel stuff. Now, I find it something of a snooze. Perhaps it's because of my flimsy understanding of Einstein's theory.
Yeah, Time Travel is possible
, but generating the POWER to do it is well beyond our capabilities.
Travelling into the future is much easier than travelling into the past, though. As I understand it, there have already been experiments done on that, where they use atomic clocks accurate to the nearest billionth of a second. One is left on the surface, and one is placed in an aircraft that travels at maximum velocity. After the plane lands, they can compare the clocks, and the one from the aircraft will have lost time compared to the one that was stationary.
According to Einstein, it isn't possible to ever reach the speed of light, because as you travel faster, time essentially slows down, thus preventing you from further acceleration. (This is why all spacefaring peoples in science fiction have fictional propulsion systems, such as warp drive and hyperdrive, in order to make interstellar travel possible.) If you had a way to approach the speed of light, you could slow down time enough to travel into the future, because time would move at the normal rate for everyone else.
Nobody knows how travelling into the past would work, though. IIRC the result of doing so would be the universe imploding, or something.
I really have no idea how physicists come up with these kinds of ideas or have any confidence that they are correct, but I'm no physicist, and this entire post could be completely wrong. I prefer suspending disbelief when it comes to any technological marvel of science fiction shows.