Earth

Earth (also known as Terra or Sol III) is a class M planet, the third planet in the Sol star system in the space of the galaxy's Alpha Quadrant, at coordinates 1.23N 2.79W. It is the Federation capital, and the primary political subdivision of United Earth, one of five founding members of the Federation. Its sentient species include Humans and cetaceans.

Earth served as the model for the class M classification.

It has one moon, Luna.

It is often called Terra, its Latin name, by many non-Humans throughout the Federation. The term Terran can refer to Humanity in general, to things related to Earth, or specifically to its citizens. See also Terran Empire.