Re: Solar system formation
That idea is not generally accepted in scientific circles.
Instead, a more gentle (but not totally calm) model of a spinning nebula, drawing inwards to the Sun, with clumps of matter stranded in the disk, gradually forming small asteroids which gathered into larger planetismals, which gathered into full-blown planets.
There is a volatility gradient away from the heat of the central core of the proto-sun. Metals inward, ices and gases outwards.