The sun and the nine planets are part of the Solar System. The nine planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. The Sun is in the centre of the Solar System. All the nine planets move around the Sun in a large oval path. The planets also spin by itself.
- Asteroids are huge chunks of rocks that travel round the Sun.
- Comets have long glowing tails.
- Meteors are tiny rocks which probably come from the asteroid belt.