There are NINE planets in the solar system. This is the order they appear from the sun: Mercury , venus , Earth , Mars , Jupiter , Saturn , Uranus , Neptune , Pluto. An easy way to remember the order in an interesting way is to make up a little sentence using the first letter of each planet , here is an example: My Very Educated Mother Just Served Us Nine Pizzas.-Try making up some on your own , it could be fun!