Earth

The Earth is the third planet from Sol and one of the only planets with life. The Earth formed 4.57 billion years ago as the nebula which created the Sol System collapsed. When it was young, the Earth was hit by many comets and asteroids. The comets created the seas and oceans covering 70% of the planet and the asteroids created the huge impact craters. About 4.52 billion years ago, the Earth suffered a large impact which created its only satellite, Luna. A large body slammed into the Earth and got destroyed in impact. Pieces from the Earth were blasted into orbit around the planet and joined together with the pieces from the destroyed body by dust and rock to form Luna.