The Solar System

There are nine planets in our Solar System. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto (although pluto is not actually classed as a planet, we still count it). All nine planets orbit the The Sun in their own course. The inner planets (Mercury, Venus, Earth and Mars) are seperated from the rest of the planets, as they are surrounded by an asteroid belt.

The Planets
The nine planets in the Solar System are:

The Orbits
Each planet has it's own orbit course. The planets closest to the sun have shorter obit time than the planets further away. Pluto, however, has an orbit different to the rest. Instead of orbiting round in it's own corse on the outside, it crosses with other planets courses.

As shown in the table above, the closer the planet is to the sun, the faster it travels. This is due to the gravitational pull the sun has.