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- Newsgroups: rec.puzzles
- Path: sparky!uunet!cs.utexas.edu!tamsun.tamu.edu!zeus.tamu.edu!dwr2560
- From: dwr2560@zeus.tamu.edu (RING, DAVID WAYNE)
- Subject: Re: Billion-year survivability
- Message-ID: <20NOV199215261116@zeus.tamu.edu>
- News-Software: VAX/VMS VNEWS 1.41
- Keywords: pi, Louie
- Sender: news@tamsun.tamu.edu (Read News)
- Organization: Texas A&M University, Academic Computing Services
- References: <1992Nov10.195614.20902@pasteur.Berkeley.EDU> <BxIuMM.GuK@news.cso.uiuc.edu> <1992Nov18.183510.15059@wam.umd.edu> <1992Nov20.050058.11151@cs.cornell.edu>
- Date: Fri, 20 Nov 1992 21:26:00 GMT
- Lines: 15
-
- karr@cs.cornell.edu (David Karr) writes...
- >If you set out in a rocket ship that maintains a constant acceleration
- >of one gravity (as perceived by you in the ship) for the entire duration
- >of a trip straight out to a point some distance away from the Earth and
- >back (obviously using its rockets to decelerate during part of that time),
- >and timed to take exactly 1 billion years Earth-frame time for the round
- >trip, how much will you age during the trip, assuming you live that long?
- >What is the dependence on the rate of acceleration?
-
- It takes about a year to reach relativistic speeds. Each year of proper time
- after that is about an e-fold increase in earth time, so it takes about
- 20 years. This result is approximately inversely proportional to g.
-
- Dave Ring
- dwr2560@zeus.tamu.edu
-