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- Newsgroups: sci.astro
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!hellgate.utah.edu!csn!stortek!sanitas!pg
- From: pg@sanitas.stortek.com (Paul Gilmartin)
- Subject: Re: Averting doom
- Message-ID: <1992Dec26.153304.8294@stortek.com>
- Sender: usenet@stortek.com
- Nntp-Posting-Host: sanitas.stortek.com
- Organization: Storage Technology Corp.
- X-Newsreader: TIN [version 1.1 PL7]
- References: <JMC.92Dec26004848@SAIL.Stanford.EDU>
- Date: Sat, 26 Dec 1992 15:33:04 GMT
- Lines: 24
-
- John McCarthy (jmc@SAIL.Stanford.EDU) wrote:
- : But they say mirrors on Earth or shades in space
- : potentially could shield our planet from increasing heat
- : from the sun and delay the catastrophic consequences. Other
- : possible solutions- building closed environments like the
- : Biosphere Two project in Arizona... or setting up controlled
- : Earth-like environments in space.
- :
- : A more straightforward solution is to move the earth further from
- : the sun as the sun warms up. What are the easiest ways of doing
- : this?
-
- Larry Niven, in "A World out of Time", suggested moving a gas giant
- planet into Earth's orbit a few degrees ahead of the Earth. The
- resulting gravitational perturbation would gently accelerate the
- Earth into a higher orbit. The gas giant is expendable: its
- substance becomes thermonuclear fuel and reaction mass.
- : --
- : John McCarthy, Computer Science Department, Stanford, CA 94305
- : *
- : He who refuses to do arithmetic is doomed to talk nonsense.
- :
- I believe arithmetic argues that shields or domes are feasible with
- forseeable technology; moving the Earth is not.
-