Originally Posted by Renairy
Originally Posted by HK_47
time travel is possible, but you can only travel forward in time, that would require traveling near the speed of light. say your space ship can travel 99.8% the speed of light, every hour you spend aboard that ship would be a full year back on earth, of course it would take years to accelerate to that speed, even if we did have an engine capable, how do you slow down, and how to you turn the thing around and get back to earth?
Lets not get carried away. Define time ?
Time is a measurement.
How can you say that traveling faster than the speed of light (also a measurement) would alter anything that is currently happening.
All you are doing is moving really fast between two points. It would not put you in the past nor the future.
We know that time slows to a stop if you reach the speed of light (mathematically), if you were to exceed the speed of light somehow, that same math says time for you would reverse. Of course, that same math also says you need infinite energy to reach the speed of light, which isn't possible. It's all theoretical.
I don't believe you can travel backward in time either, but just because we believe that now doesn't mean we won't discover something in 100 years that turns that idea on its head.