A Nice Story:
I am going to try to convince you that:
And everyone lived happy ever after.
- The 4 giant planets formed within 15AU or 20AU of the Sun.
- Beyond them was a massive disk that extended to ~30AU.
- The 4 giant planets slowly spread due to leakage from this disk.
- Jupiter and Saturn crossed a mean motion resonance at 700Myr
- In orginal work it was the 1:2MMR, but it could have been the 3:5, or even 11:8.
- Uranus and Neptune went unstable and scattered into the disk.
- Producing the Trojans, Kuiper belt, irregular satellites, primitive main belt asteroids, and lunar late heavy bombardment (LHB).
- Uranus and Neptune evolve onto current orbits due to interactions with the disk.