Solar system

The Solar System is our local star system containg 1 star, 8 planets, 27 highly likely dwarf planets, and 19 major moons. It also contains the planet Earth where Human resides. Beyond 90 Au, the majority of the Solar System consists of a near-vacuum known as the interplanetary medium.

Formation
The solar system formed at 4600 MYA when Sun collapsed from a previous star's leftovers. It was not very dense, and a had a dust disk around it. The dust particles there began clumping into knots, which clumped into asteroids followed by planetesimals. And the planetesimals eventually stabilized into 10-15 Planets. Most of these got kicked out, leaving us with the 8 today.