Urs system
From Halopedia, the Halo wiki
The Urs System is a former Covenant-controlled Ternary Star System, now under the auspices of the Covenant Separatists. As the homeworld system for the Sangheili, it is unusual for having three stars, although Urs is the primary star around which Sanghelios orbits. The system also has three other planets, not much is known about these planets. [1]
