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From: giles@ucf-cs.UUCP (Bruce Giles)
Newsgroups: net.space
Subject: Re: Deuterium on Venus
Message-ID: <1145@ucf-cs.UUCP>
Date: Tue, 10-Jan-84 19:29:28 EST
Article-I.D.: ucf-cs.1145
Posted: Tue Jan 10 19:29:28 1984
Date-Received: Wed, 11-Jan-84 05:36:19 EST
References: <14945@sri-arpa.UUCP> 3 January 1984, <730@ssc-vax.UUCP>
Organization: University of Central Florida
Lines: 26


     Let us say you wanted to raise the temperature by a factor of 4.
     This requires 64 times as much incident intensity.  Assume that
     this is gotten from solar sails in Venus vicinity.  They need a 
     total surface area of 7.24 billion km**2.  If their thickness is
     .15 microns, then the volume of material required is only 1.1 km**3,
     not an unreasonable quantity.

And we wave a fond farewell to the lightsails as they accelerate into 
the darkness of interstellar space.


(may not make too much sense towards the end, but it sounds good)

(hint: divide 7.24 billion km**2 light pressure at Venus by the mass 
 of 1.1 km**3 of material, and use F = ma).

Bruce Giles
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