(urth) grumble at wolfe comment made attached to guardianarticle

[David Duffy]

On Tue, 8 Feb 2011, Jeff Wilson wrote:

> On 2/8/2011 9:36 PM, Gerry Quinn wrote:
>> I forgot about that.
>> But one or both could have an elliptical orbit.
>> Again, I don't know whether precession would make this unrealistic or
>> not. And 35000 leagues is incredibly, dangerously close for two
>> Earth-sized planets.
>> But in terms of basic mechanics, a series of conjunctions should be
>> possible (for story purposes, I think it would probably be sufficient if
>> the series lasted a few centuries).
>
> They could be paired in a horseshoe orbit:
>
> http://curious.astro.cornell.edu/question.php?number=210

And

http://iopscience.iop.org/1538-3881/129/3/1724/204215.text.html

But these guys keep trying to make them crash into each other ;)