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From: Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: OT: alien radio signals
Date: Wed, 27 Nov 2024 14:11:23 +0000
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On 27/11/2024 12:54, Liz Tuddenham wrote:
> Bill Sloman <bill.sloman@ieee.org> wrote:
> 
>> On 27/11/2024 6:58 pm, Jan Panteltje wrote:
>>> A 2.9 hr Periodic Radio Transient with an Optical Counterpart:
>>>    https://iopscience.iop.org/article/10.3847/2041-8213/ad890e
>>>
>>> No good movies and music yet...(decoded that is)
>>> But at least technical details such as frequency etc..
>>> Some very peculiar.
>>
>> A close-orbiting pair of white dwarf stars could be doing lots of
>> peculiar stuff, without any help from aliens.
> 
> Would a cluster of three or more be stable?  If so:
> 
> Dit-dit-dit dah
> Dit-dit-dit dah
> Dit-dit-dit dah
> 
> or even:
> dah-dit-dah-dit     dah-dah-dit-dah

3 body problem remains unsolved and probably insoluble analytically 
apart from a special case of fairly massive stars in mutual orbit and a 
small mass at one of the two stable L4, L5 Lagrange points like the 
Trojan asteroids locked in equilateral triangles with Jupiter and the sun.

https://en.wikipedia.org/wiki/Lagrange_point#Stability

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

-- 
Martin Brown