The Solar System has eight planets, arranged in order of distance from closest to farthest from the sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Mercury is the planet closest to the sun and it's also the smallest, only slightly larger than Earth's moon. It's a planet in the solar system named after the Roman gods. The 2nd Planet in the Solar System – Venus is the second planet from the Sun, Venus is the twin size of Earth. The surface has many different mountains and volcanoes.It is name after the roman god mercury , who was the fast flying messenger of the god. Earth is the third planet closest to the solar system, and the only planet with life. The fourth planet closest to the sun is Mars and the second smallest planet in the solar system. It is named after the roman god of war. The 5th planet in the Solar System – Jupiter is a gas giant. This is the largest planet in the system our sun. This is a planet named after the god of thunder and lightning. 6th Planet in the Solar System – Saturn is the sixth planet from the Sun, Saturn is best known for its rings. It is name after roman god of agriculture. Uranus - the seventh planet in the Solar System has extremely strange and interesting features. Uranus is the first planet in the Solar System to be discovered using only a telescope. 8th planet in the Solar System – Neptune is the eighth planet from the sun, Neptune is about the same size as Uranus. It is name after the roman god of the sea