How did a nebula change into a solar system?

Answer 1

So 1st there was a big mass cloud of dust, gas and debris called a nebula 4.6 Billion years ago. Then a nearby star exploded. Thats called a Supernova. The force of the explosion caused the nebula to start "spinning." Everything starting crashing into each other. The collision between the material cause much of the materials to "glue" together. Eventually, 99% of all the mass from the Nebula became the center, which is our Sun. While everything else, the 1% became the celestial bodies like the planets, stars, moons, etc.

Answer 2

A nebula collapsed due to gravity, causing it to spin and heat up. As it contracted, a disk of material formed around a central core, which eventually became the Sun. Within the disk, small particles collided and stuck together to form planetesimals, which further accreted to form planets and other celestial bodies in the solar system.