X-Message-Number: 22188
From: 
Date: Sat, 12 Jul 2003 20:13:00 EDT
Subject: Re: Time travel

--part1_e.330f92c9.2c41fe0c_boundary
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit

In a message dated 7/12/2003 3:00:48 AM Mountain Standard Time, 
 writes:


> >As for the usual paradox of killing your grandfather etc., the latest 
> answer
> >I read is that you just can't.
> 
> How much *can* you do, and does this qualify as time travel?
> 
> I believe they think you could do things that did not interfere with the 

start of your own trip.  E.g. you leave earth in 2500 and arrive at the black 
hole 
in 2510, traveling at roughly light speed.  Then you could go through the 
hole and emerge in 2500 at a location near earth, and visit it from 2500 on,  
without interfering with yourself on the way out, even if you did something 
dramatic like crashing and destroying a city.  

Maybe, coming out of the hole,  you could pass yourself on the way in, *if* 
you had seen a ship pass you on the way in.

As I understand the SciAmer. articles, you could go into the past and 

influence it, up to a point.  And it would seem you could observe at any time in
the 
past, so long as you did not interfere. I have not seen any discussion of 

whether you could observe the future from the present.  Perhaps you could, so 
long 
as it was not an event that you could influence -- e.g. you could observe a 
planet 200 light years away, 199 years in the future.


Alan Mole


--part1_e.330f92c9.2c41fe0c_boundary

 Content-Type: text/html; charset="US-ASCII"

[ AUTOMATICALLY SKIPPING HTML ENCODING! ] 

Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=22188