Dr Hal Levison Earliest Formation of the Planets
I watched a programme on Discovery Channel in which Dr Levison appeared.
His website is at:
http://www.boulder.swri.edu/~hal
As far as I remember this is a summary of what he was saying:
He has a theory on how the planets formed in pairs.
He noticed the connectedness of Uranus and Neptune
I describe the behaviour of the planets on my page on complex forces:
I DO believe that Jupiter and Saturn can switch orbits again (very rarely I admit).
