Am 27.08.2014 17:35, schrieb clipka:
> Am 27.08.2014 03:56, schrieb Francois Labreque:
>
>> Relatively stable system with two planets.  Green's orbit is way too
>> wobbly to sustain life, but life on Blue could potentially exist,
>> albeit, with Game-Of-Thrones-like seasons that last for years.
>>
>> http://goo.gl/7D4kG9
>
> Difficult to form naturally, with the planets having an opposite
> direction of revolution.

Anterograde, with the outer planet pair oscillating between two orbits 
with different excentricity.

(Ultimately colliding with one of the inner planets, sadly.)

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