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From: wex@mcc.arpa
Newsgroups: net.sf-lovers
Subject: Time travel, take 2
Message-ID: <291@caip.RUTGERS.EDU>
Date: Wed, 30-Oct-85 12:01:34 EST
Article-I.D.: caip.291
Posted: Wed Oct 30 12:01:34 1985
Date-Received: Fri, 1-Nov-85 02:47:23 EST
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Organization: Rutgers Univ., New Brunswick, N.J.
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From: Alan Wexelblat 

Thanks to those who replied to my earlier posting on time-travel.
One thing still puzzles me though:  Is it the case that the center of
mass of the universe doesn't move?  Is is (theoretically) possible to
calculate our position/velocity w.r.t. this non-moving point?  People
seem to talk about our universe as expanding, but exapanding away from
what?
--Alan Wexelblat
WEX@MCC.ARPA