Sol system

The Sol System, otherwise referred to by UNSC personnel and Humans alike as the Solar System, is the home star system for Humans. The system's G-class star is named Sol, hence the system's name.

Major Planets and Moons

 * Mercury
 * Venus
 * Earth - The Human/UNSC Headquarters (HQ)/Homeworld.
 * Luna
 * Mars-A major site of the Interplanetary War and later during the Human-Covenant War it was the site of the Battle of Mare Erythraeum
 * Jupiter - A gas giant, Jupiter is the largest planet in the Sol System.
 * Io - The site of a UNSC listening post. On October 20, 2552, the listening post on Io detects 15 Covenant ships inbound under the command of the Prophet of Regret.
 * Europa - It contains a UNSC base. Spartans Linda and Will were once assigned to a mission on this satellite.
 * Callisto - The Second Largest Jovian Moon. Herzog claimed to have to deal with paperwork regarding surveillance here.
 * Ganymede - The EVA Armor was developed here.
 * Saturn - A gas giant known for its clearly visible surrounding rings, unlike the other gas giants whose rings are rather dim. Saturn is the second largest planet in the Sol System.
 * Uranus - An icy gas giant about twice as far away as Saturn from Sol.
 * Neptune - Furthest away from Sol, it is another icy gas giant similar to Uranus.

Dwarf Planets

 * Ceres - The largest asteroid to have ever been discovered by humanity.
 * Eris - Currently the largest Dwarf Planet known. It is almost 10% larger than Pluto in diameter.
 * Pluto - Pluto Slipstream Monitoring Station Democritus. On November 3, 2552, the Monitoring Station detected Cortana's signal in Slipspace with Dr. Halsey's message to Lord Hood.

Trivia

 * Sol is the original Latin and the actual scientific name for Earth's Sun. The designation and name has actually been used instead of "Solar System" in many Sci-fi novels.

Links
Halo Mapping Project