*Formation occurs beyond the frost line *Planetary embryos form among various
ices
*Embryos continue to form and reaches
5-10 Earth masses
*This mass is necessary for accretion of
helium and hydrogen
*Accumulation of gas by the core is a
slow process
*Takes several million years
*After the forming of the protoplanet
reaches about 30 Earth masses it
accelerates and proceeds in a runaway
manner
*Accretion stops when gas is exhausted
*These planets can migrate over long
distances during or after their formation

Giant Planets Form