QUOTE (theSOURCE @ Apr 7 2008, 06:38 PM)

I must've read the wrong info somewhere.
Thanks.
You're welcome, Source!
Lost made an associated point regarding Special Relativity that is apropos to discuss in this framework:
QUOTE
MID,
What's interesting is that Time Dilation itself negates the need for "speeds in excess of c "! If we get technical, we could travel to any point in the Universe in 5 minutes if we had enough energy, and we never have to exceed c in order to get there accourding to 'our' reference frame thanks to Time Dilation. In fact if we were 'Traveling' near c it would even seem to us that we were traveling faster than light accourding to 'our' on-board clocks!
The point is that a 'Traveler' never needs to exceed c in order to reach point b!
That is fundamentally true in some respects, but no matter what the fraction of "c" we attained, our on board clocks wouldn't actually seem to be doing anything out of the ordinary to us as the traveler. From Earth, if they could observe our clocks...it might appear as if they weren't moving at all at a substantial fraction of "c".
Special Relativity's fundamental mathematics prohibit speed at or in excess of "c". However, time dilatation (dilation...same thing, I've always had the habit of using "dilatation") also mathematically predicts a slowing of time "relative to the stationary observer" as the speed increases toward the limit of "c". In theory you can get infinitessimally close to "c" without reaching it, and that's very significant, as pertains to time dilatation.
You actually need a very substantial fraction of "c" to have truly pronounced effects (99% or greater of "c" would be nice...(around 185,000 miles per second)).
Your time, as the traveler, would theoretically slow down relative only to the stationary observer...not to you as the traveler.
Let's say, for instance, we're going to go to a star system 10 light years away. We're going to explore a planet we know is there that might support life.
10 LY is an immense...beyond contemplatable distance (600,000,000,000,000 miles (roughly speaking)!

What???). To give it perspective...if we were to set out and be able to attain the incredible velocity of 100,000 MPH...it would take 6 BILLION YEARS to get there...
Not exactly pragmatic. The Sun would be gone, and the Earth would be gone when you got there...not to mention that the planet you were headed to might already have been consumed in a red giant or a supernova by that time.
But suppose you could attain a substantial fraction of the speed of light.
70% "c"?
The trip would take you 7 years and 2 months (roughly), ship's time.
To the Earth observer, it would take you 14 years outbound.
80% "c"?
The trip would take you 6 years ship's time.
To the Earth observer, 12 1/2 years outbound.
90% "c"?
16 months outbound....to the Earth observer? 13 months.
Now we're getting somewhere.
99.999997% "c"? (in other words, get yourself up to within about 20 miles per hour of "c")
You'd get there in 21 hours or so ships time.
On Earth...~10 years would pass.
Say you got that huge fraction of "c", went out 10 LY, visited for a year, and returned, again screaming at nearly light speed.
By your ship's clocks, a year and a couple days would've elapsed...but here...20 years ( and a few days) would be gone when you returned.
Yes...Special Relativity does provide a means by which you could travel interstellar distances in theory.
10 LY would be one thing...and the oddity of returning to a planet 20 years into the future might make things a little difficult. But significant distances could be traversed in small amounts of ships time at huge fractions of "c".
Suppose you could get all the way up to within 1 mile per hour of "c".
You could go all the way out beyond the edge of the Milky Way Galaxy, snap a picture, and return to Earth in a matter of 1 year!
However...on Earth, 200,000 years would've elapsed.
While it's theoretically possible, for the traveler, it's not entirely pragmatic, for those left behind...