On 9/15/2012 10:59 PM, Bigchunk83 wrote:
Then come back to earth and look into the mirror. What would I see?

If you could make the trips instantaneously, you'd see precisely what
was happening at the moment you left to head back, 10 years previously.

I always though the idea of interstellar travel would be very
interesting if you could use a 'teleporter' like device.

Sure you have to wait the centuries until the "transceiver" arrives at
its distant destination, but once activated, you'd step into the
teleporter on Earth and presto! you arrive at your destination at what
seems to you to be instantaneously because your "teleporter signal"
propagated through space at the speed of light.

Of course, for a destination 10 light years away, at the time of your
arrival 10 years would have passed on Earth. But any signal sent along
with you would also take the same amount of time to traverse the
distance so as far as you know nothing transpired "during" the trip.
BUT, on your way back, step back into the teleporter and presto! you
arrive now 20 years into Earth's future. A very different place than the
one you left behind!

A two-way trip through space becomes a 1-way trip through time.

Dave