What is the Solar System?

The solar system is our sun and everything that travels around it. Our solar system is elliptical in shape. Elliptical means egg-shaped. The sun is in the center of the solar system. Our solar system is always in motion. The sun is the biggest object of our solar system. It contains more than 98% of the solar system's mass. Astronomers think the solar system is more than 4 billion years old. The sun has enormous power from Hydrogen and Helium. The sun is a member of the Milky Way Galaxy. Planets travel around the sun in different orbits.
What are the orbits? Spacecrafts are called orbiters. Orbiters are very similar to planets. Planets are usually named after the Greek gods. For example, Venus is the name of the love butty God.
Our solar system is made up of 9 planets, the sun and our moon. The first 4 planets are called the inner planets. They are closest to the sun. Their names are Mercury,Venus, Earth and Mars. These planets are made mostly of rock.
The next five planets are called the outer planets. Saturn, Jupiter, Uranus and Neptune. They are called gas giants, because they are made mostly of gases. The last planet is Pluto. It is coated with ice.
In 2006 an astronomers renamed Pluto, Eris and Ceres dwarf planets.