Cloud shrinks to rapidly rotating disk. Grains collide and grow into dust balls. These collide and grow into progressively larger bodies. Planets grow by accretion. Process ended about 4.6 billion years ago.
Fusion begins in core of protosun.
Sun blows off outer envelope. Super solar wind carries away remains of nebula. Sun is now star visible from outside. Perturbations of comets by gas giants in outer solar system throw comets and some asteroids into distant orbits about sun. Heavy bombardment of planets by asteroids and comets.