A Nice Pretty Picture: The Standard Model
Three major stages of planet formation:
1-10km objects form by two-body accretion, gravitational instability, turbulence
or something else.
Big guys grow faster than small guys
As long as
is not affected by big guys.
Assumed to end when embryo feeding zones run into one another (Lissauer 1993)
Big guys dynamically interact and grow via collisions.
Fernandez & Ip build Uranus and Neptune from Lunar/Earth-mass objects in < 2x10
Used a Monte Carlo, Öpik code.
Brunini & Fernandez `confirm' these results with direct
So, problem solved!