Homeworld
Earth is the homeworld of the Human race. The Babylon 5 series is set in the 23rd Century, and like the Earth of today, the 23rd-Century Earth has blue skies, large oceans, and seven continents as well as numerous islands of various sizes. Earth's population in the Babylon 5 universe is approximately 9 billion.
In addition to Earth, humans have colonized 23 other planets by the opening of the Babylon 5 space station, together forming the Earth Alliance. Other major planets that humans have colonized are Mars, Orion 7, and Proxima 3.
Read more about this topic: Human (Babylon 5)