en.wikipedia.org
Solar System
Planetary system consisting of the Sun and objects orbiting it
- The Solar System is the gravitationally bound system of the Sun and the masses that orbit it, most prominently its eight planets, of which Earth is one.
- The Solar System is an isolated single-star planetary system within the Milky Way Galaxy.
- The system formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, creating the Sun and a protoplanetary disc from which the orbiting bodies assembled.