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From: jimc@haddock.UUCP
Newsgroups: net.physics
Subject: Back to the Past
Message-ID: <92300002@haddock.UUCP>
Date: Fri, 30-Aug-85 01:17:00 EDT
Article-I.D.: haddock.92300002
Posted: Fri Aug 30 01:17:00 1985
Date-Received: Sun, 1-Sep-85 13:13:02 EDT
Lines: 29
Nf-ID: #N:haddock:92300002:000:1024
Nf-From: haddock!jimc    Aug 30 01:17:00 1985


Here is a question from one who knows next to nothing about physics.
Seeing how there has been extensive talk in other newsgroups (like
net.movies) about the conceptual paradoxes in traveling backward
through time, I am now curious:  is travel into the past theoretically
possible?  Or is this subject relatively untouched by physics?

I have heard of the idea of some elementary particles going back
through time in certain situations which have yet to be effected,
but I don't know how reliable such speculation is.  Can anyone
comment on this?

I also know that Einstein's special theories picture time as
relative, and that time passes more slowly for objects in motion
than for objects at rest.  However, this would seem to permit
only travel into the future at varying rates, without any
accommodation for travel into the past.  Did Einstein ever
discuss time travel in the opposite direction?

	
				Jim Campbell

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"No dance tonight!"