Many people know the solar system we live is composed of eight planets. As for other details, they would say there are also the moon and the earth.

In fact, for the broadly defined "solar system", besides the Sun at the central and the eight major planets (Venus, Jupiter, mercury, Mars, Saturn, earth, Uranus, Neptune), comets, and interstellar dust, there are also the asteroid belts filled with small rocks which is called the second small celestial bodies of the Kuiper belt. ...