The Inner Planets
The inner planets are Mercury,Venus,Earth and Mars. They are the four smallest planets and are the four closest to the sun.Theese planets are solid,rocky, have thin atmospheres and few moons.
The Outer Planets
The four outer planets are Jupiter, Saturn, Uranus and Neptune. The outer planets are known as the "Gas Giants" .They are called this because they are the four largest planets in our solar system and are also mainly made of gas. These planets also have the most moons and are spaced out farther than the inner planets.