In the big, big universe, there was a family: a sun mother and her eight children.
This family was called the Solar System, and everyone envied them, because they were all very powerful.
Thus, the sun and its associated planets are collectively known as a solar system.
At the centre of our solar system is our mum, the Sun, and around her are many planets, asteroids, comets(tail stars), and more.
The Sun is very, very big and powerful, and it's the only star in our solar system that can make its own light.
The Sun's eight children are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
We used to say that Pluto was the ninth planet in the solar system, but we don't include it now. Pluto will tell you why later.
For now, let's talk about our proud solar system family and its frequent guest, Comet.

1. the mother of the solar system, the Sun
2. the smallest and fastest planet, Mercury
3. the brightest upside down planet, Venus
4. the most habitable planet, Earth
5. the most Earth-like planet, Mars
6. the heaviest and largest planet, Jupiter
7. the fat one with beautiful rings, Saturn
8. lying green planet, Uranus
9. the 165 Earth-years, Neptune
10. visitors to the solar system, Comets