"Dave Brickell" <d.b### [at] ntlworldnospamcom> wrote :
>
> I was quite pleased to see it settle
> into a nice little solar system.
>
> My next plan is to set up a Sun/Earth/Moon system (just to see if I can)
>
> Any ideas, comments etc....

    Actually it doesn't seem to be settling down at all... to me. I suspect
that you might still experience at least two of your three planets
evaporating out of the system.

    I have been thinking lately about solar systems, on a non-mathematical
level, and I can't see any solar system forming out of anything but a
uniform but swirling cloud of dust. It can't even be rocks.

    Dust in orbits that are not quite stable will impact dust that -is- in
stable orbits and gradually accrete an object that is large enough to
attract more dust. If there are -any- significant bodies that are not in
stable orbits, if they impact the objects in the stable orbits, they will
throw them off.

    Everything that is in the area around the stable orbit has to be
traveling at nearly the same speeds, meaning no eccentric orbits, and has to
be of minor mass.

    So, to make a solar system, start with stable orbits (as stable as
orbits ever get) or start with a dust cloud.

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