It has an atmosphere made up of many different gases, but mainly it is nitrogen and oxygen. Our planet is unique in the solar system, and not just because we live here.
Earth is only planet in the solar system that can have eclipses of the Sun.
The Earth takes one year to go completely around the Sun. The Earth also rotates, or spins, on its axis. It takes one day to spin around one complete time. The Earth's axis is not straight up and down, but tilted a little bit. This tilt is responsible for us having seasons.