A Nice Pretty Picture: The Standard Model
Three major stages of planet formation: (works for Earth)
1-10km objects form by two-body accretion, gravitational instability, or something else.
Big guys grow faster than small guys
As long as
is not affected by big guys.
Assumed to end when either: (Lissauer 1993).
A big guy ate everything in its `feeding zone.'
Or, the feeding zones run into one another
embryos are smaller.
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!