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From: matthew.malthouse@guardian.co.uk
Date: Tue, 12 Mar 2002 17:58:19 +0000
Subject: Re: (urth) Leagues and gravity

On 12/03/2002 15:48:42 Michael Straight wrote:

>On Mon, 11 Mar 2002, Grant Peacock wrote:
>> I think you are surely right that the orbits are unstable, even if the
>> exerted by Green on Blue is a small percentage of that exerted on Earth
by the
>> moon.  This means that the arrangement is a new one.  For those who
>> Blue=Ushas theory, what must have happened was that the white fountain
>> Lune out of orbit as it came lumbering in and made into a planet.
>But every version of the Blue=Ushas theory I've seen at least admits a
>very long time between Severian and the Short Sun Books (long enough for
>Neighbor civilization to rise and fall), which is probably too long for
>such unstable orbits.

For this it doesn't matter if Blue=Ushas or not: any of the explanations
requires a system stable enough for the history of the Neighbours etc and
so far I don;t think we've come up with a mechanical solution that would



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