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From: Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups: sci.electronics.design
Subject: Re: OT: alien radio signals
Date: Wed, 27 Nov 2024 17:14:53 -0000 (UTC)
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Martin Brown <'''newspam'''@nonad.co.uk> wrote:
> On 27/11/2024 15:25, Phil Hobbs wrote:
>> Martin Brown <'''newspam'''@nonad.co.uk> wrote:
> 
>>> Ultimately in the very long term it is thought that for three (or more)
>>> bodies in general three of them will get close enough together at some
>>> point that the smallest one gets expelled and the others will end up
>>> more tightly bound together. Ovenden's conjecture also AFAIK still
>>> unproven is that the gravitational dynamics will perturb their orbits in
>>> such a way as to put off the evil day for as long as possible.
>>> 
>>> I can't find anything suitable online but it seemed like a very
>>> reasonable way to explain Bode's law from first principles and the same
>>> locked resonance patterns seen in other planetary moons. This is the
>>> closest I've been able to dig up. Ovenden's conjecture gets and
>>> honourable mention in A.E. Roy's 1970's book "Orbital Motion".
>>> 
>>> This comes closest:
>>> https://academic.oup.com/mnras/article/115/3/296/2603818
>> 
>> Michael Ovenden was my celestial mechanics and galactic dynamics prof at
>> UBC. A great guy, whose hobby was teaching New Age workshops at Cold
>> Mountain Institute. (An odd name for a small barge floating in the harbor,
>> but I digress.)
>> 
>> Died pretty young, unfortunately.
> 
> Yes before retirement - it was a shame. Do you remember the title of his 
> paper making this conjecture that I am struggling to recall? I'm 
> guessing it had a more anodyne name at the time of publication with 
> Ovenden's conjecture what A.E. Roy called it later in his 1970's book.

Unfortunately not. 
> 
> We had Donald Lynden Bell and Martin Rees for astrophysics.

Must have been great fun.  It’s usually the guy who first figures something
out who writes best about it—you have to have a clear simple concept to do
that. 

Cheers 

Phil Hobbs 



-- 
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics