Earth

Earth, also known as Sol 3, is a small, terrestrial, mostly blue planet orbiting a G-type star in the Orion Arm of the Milky Way Galaxy. It is the home of the Guardians as well as a prison for the Archlich. It has a 75% nitrogen atmosphere and an abundance of different species of life.

Environment
Earth has a very diverse climate, with many different types of flora and fauna. While most of Earth's area is an ocean filled with water, its dominant species, humans, are terrestrial.

History
4.6 billion years ago, Entropy went to war with the Archlich, resulting in millions of losses over a prolonged period of time. After the war's conclusion, with Entropy victorious, the Lich was imprisoned in a solid metallic sphere and thrown into the far reaches of the universe, where it would hopefully never be found again. Eventually, due to accretion, the sphere formed into a planet in a stable orbit around the star Sol. The Guardian Queen later, upon discovering the prison, took up residence there when creating the Guardians, so that it would never escape.

Culture
Earth is not yet a unified planet, and while humans are the only dominant species, the planet is divided into countries with vastly differing goals, though in recent years more and more of them have been coming together in trade unions and other groups.

Trivia

 * Earth is a Type 0.7255 civilization, according to the Kardashev scale.