reply to post by BrnBdry
I'm sure speed, and time spend up there in that speed, would determine how long you go forward, or backwards depending on the direction you are
I saw the superman movie too. It wasn't any more realistic then than it is now.
The faster an object travels towards the speed of light, time slows down for it while remaining the same for us. This is how the astronauts "time
traveled" as they are orbiting faster that we are moving, slightly.
This is a forward leap, direction has no bearing on it at all.
Currently it is out of the realm of possibility for a simple reason. The faster an object travels, the more fuel that is required, which adds mass in
the form of fuel, which requires even more fuel to move the extra mass of the added fuel, which requires more fuel............
Now.... lets say we can find a new fuel source that would allow for faster travel with limited mass increase. And we send some dude blasting out away
from earth. theoretically, if he could get up to and even past the speed of light, he could get far enough away and turn around, use a telescope, and
see into the past.
He can't affect it in any way, but he could, in a very real sense, see into the past as he's gone past the light rays from earth and is seeing them
possibly millions of years before he even left.
Time travel is possible, probably just not for humans.
There is another tantalizing possibility. Gravity. HUGE masses have huge gravitational effects which, according to our physics, can bend light and
warp space time. It could be possible to create an artificial time slip with a massive gravity. It could even allow us to bend spacetime in such a
way as to create a "stable" wormhole.
Time ceases to exist at the center of a black hole. As light approaches the event horizon, it can not escape, hence the "blackness" of the black
hole. The objects mass is so great, that not even light, the fastest thing in the universe, can escape it.
In my opinion, the key to time travel is sitting on the event horizon of a super massive black hole, waiting for us to come get it.
I seriously doubt the ability to travel back in time, I don't think the universe would still be here if a paradox was a real possibility. So either
time travel is a fast forward button only, or you can move freely in time, but you aren't really moving in time so much as you are moving through
edit on 8-8-2011 by phishyblankwaters because: (no reason given)