Sol

Sol
Sol is the current name of the system in which Earth and all the other planets reside. Before the 2074 Agreement, the official name of Sol was "the Solar System".

Sol contains a single, G-type star, which shares the name of the system. Eight planets orbit Sol. The four inner planets are all terrestrial, while the remaining four are massive gas giants. The planets, outward from Sol, are named as follows: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. One of the system's belts, simply called the asteroid belt, orbits between Mars and Jupiter, separating the inner planets from the outer planets. The other belt, named the Kuiper belt, rests far beyond the orbit of Neptune and contains several dwarf planets, including the demoted Pluto.

Sol was formed an estimated 4.6 billion Terran years ago. The star was created by an interstellar gas cloud which collapsed under its own gravity, triggering nuclear fusion. The star then proceeded to burn, and "manufacture" the rest of the known elements. The planets formed out of assortments of rock, ice, and gas. The asteroid belt is suspected to have been created when a ninth planet tried to form between Mars and Jupiter. Due to Jupiter's massive gravity, the planet was unable to form and was ripped apart.

The system itself is located within the Orion Arm of the Milky Way galaxy. It circles Sagittarius A every 225-250 million Terran years.

Colonization efforts, spearheaded by the ISCO, have established colonies on Luna, Mars, and asteroids in the Belt, namely the dwarf planet Ceres. While most of the population is still centered on Earth, with 20.7 billion people, the remaining ~700 million are spread out across the Territories. Around 630 million are currently located on Mars, with 10 million in the Belt and 60 million on Luna. All population data was taken in 2146.