Describe how the sun was formed.

1)4.6bil years ago it was a nebula - cloud of dust and gas 2)Collapsed under its own gravity transferring gravitational potential to kinetic. 3)Nebula got denser rotating more rapidly 4)Collisions between particles caused kinetic transferred to internal and thermal energy 5)Core of nebula formed hot dense protostar 6)When sun became hot enough nuclear fission happened: -energy transferred by radiation -hydrogen nuclei fuse forming helium nuclei 7)Sun is at its equilibrium: gravity pulls inwards, nuclear reaction expand outwards do gravitational collapse is balanced