Nick, I think we should start right here in the solar system, and look at three issues (perhaps there are more?) that the mainstream has totally glossed over. We have the precession of lunar orbits, that relationship between orbital eccentricity and inclination, and Bode's law.nick c wrote:
We have used examples within our solar system to try to understand how solar systems function. But we have many examples of odd ball exo solar systems, that defy any attempt at generalizations.
1. We know that Earth precesses. One area where the mainstream and the mythology agree, is that Earth precesses about a point in Draco. Our best estimates are that around 13,000 years from now, our pole will be a full 47 degrees away from where it is now. The proposed mechanism, was that gravitational tugs on an oblate Earth, caused the Earth to precess. By the same token, an oblate gas giant, like Uranus, should also precess. If we want to switch to magnetic forces, like Charles proposes, we should still expect both the Earth AND Uranus to precess. It would seem to be difficult to provide a mechanism where Earth precesses, yet Uranus does not.
Why is that a problem? Well as you pointed out, Uranus has satellites that orbit in the planet's equatorial plane. What are the choices here? Either we are living in a special time, where Uranus' pole has precessed to line up with those lunar orbits? Or those lunar orbits precess too? As you pointed out, Uranus is nearly on it's side, meaning that it's pole should sweep out wide arcs in the sky (as opposed to the relatively small circle swept out by Earth's pole). Those lunar orbits ( if they remain in Uranus' equatorial plane) should then be able to flip completely over, relative to the sun?
2. We have that relationship where circular orbits lie in one plane, and more and more eccentric orbits are more and more inclined. This seems to be true of planetary orbits, where Pluto is most inclined and eccentric, of lunar orbits (like with Phoebe), and even planetary rings. I don't see a mechanism proposed by the mainstream, or even many that would acknowledge the pattern.
3. Bode's law the mainstream has blown off. An argument against Bode's law, is that Neptune is clearly in the wrong place. The law worked "coincidentally" in the other cases. It is important to point out,however, that the asteroid belt, Uranus, and Pluto, all had orbits predicted before they were found. That is quite a bit of "coincidence". May it not be instead Bode's law is the rule, and Neptune the exception that helps prove it?