Answer:
Astronomers used to think that the planets in the solar system formed right where they are today. Near the young sun, it was too hot for volatile compounds such as gases and ices to exist. The only construction materials were rocks and metals, so only small, rocky planets could form there.
Our solar system consists of our star, the Sun, and everything bound to it by gravity — the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, dwarf planets such as Pluto, dozens of moons and millions of asteroids, comets and meteoroids
The Sun's gravitational force holds the solar system together.
It also provides us with light and heat that are powered by nuclear reactions burning constantly inside the Sun. Without this light and heat, there would be no life on Earth -- so the Sun is very important to us
