"Time Travel"

[Patashu]

Originally Posted by gausmaster

This is somthing I have been pondering for quite some time and I would like imput from a few high-level thinkers.
I know there are a couple impossibilities in this idea but please dont get hung up on them.
When you see a star at night, the light you are seeing is not what is happening right now but what was happening (perhaps) millions of years ago based on the speed of light and the extreme distance betwine the Earth and most stars.
So here is my theory.
Assume (by some freak act of phisics) that we found a way to rocket a shuttle many times faster then the speed of light. If we shot this shuttle very far away from earth and passed light for a long period of time would we be able to eventualy stop and (with a very powerful telescope) look back at the earth as it was thousands or perhaps millions of years ago? Just like we on Earth can see the birth of a star that has most likely already died out in real time, could we look back on Earth and see such things as living dinosaurs, or the Battle of Thermopylae? Or possably see yourself playing outside as a child? I'd like to hear your ideas.

yes that's right, and in fact if you can send signals at superluminal speeds back to earth just like you brought your rocket to such a speed you would be able to interact with earth's past - time travel
assuming special relativity holds FTL leads to time travel but it also means you've lost causality, as effect can now precede cause. that's generally not a good thing