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From: "James Wynn" 
Subject: RE: (urth) FTL Travel
Date: Mon, 18 Nov 2002 14:10:08 -0600

Nicely done, but place our explanations side by side and I think you can see
why I explained it the way I did .

-- Crush

-----Original Message-----
From: Andy Robertson [mailto:andywrobertson@clara.co.uk]
Sent: Monday, November 18, 2002 1:49 PM
To: urth@urth.net
Subject: Re: (urth) FTL Travel

This is not quite accurate.

What is accurate is that travelling FTL in one inertial frame, from the
point of view of one observer,  will **always** be travelling back in time
in another inertial frame, from the point of view of another observer.

God may see the universe as a four-dimensional whole, as has been discussed.

Travelling FTL requires that you have the vision of God - that you see time,
not as a progression, but as a dimension

----- Original Message -----
From: "Roy C. Lackey" 
To: "urth" 
Sent: Monday, November 18, 2002 7:09 PM
Subject: Re: (urth) FTL Travel

> Crush quoted and wrote:
> >Don asks:
> >Please explain.  Is this the usual SF take on FTL or is there a physics
> >explanation that makes backward time travel the most likely?  I'm pretty
> >ignorant on this.
> >
> >Crush responds:
> >As one moves faster and approaches the speed of light, time slows down,
> >exponentially, until time stops at the speed of light. I am informed by
> >Stephen Hawking (not personally) that it takes an infinite amount of time
> >and an infinite amount of energy to reach the speed of light.
> >
> >It is simple mathematics that as one moves faster than the speed of
> >time moves in the opposite direction. No doubt, there are other
> mathematical
> >models.
> >
> >Hence, a FTL generation ship is unnecessary.
> Thanks for taking the question. I would only add that, in the wake of
> Einstein's (and other's) theories, such theoretical considerations spawned
> someone to pen a limerick several generation ago. (From memory.)
> "There was a young lady named Bright,
> who traveled far faster than light.
> She set out one day,
> in a Relative way,
> and returned home the previous night."
> -Roy
> --



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