From Halopedia, the Halo wiki
The Napret system is a planetary system that was once in Covenant-controlled territory. Centered around the star Napret, the system contains at least three planets, the third of which is the Yanme'e homeworld of Palamok. During the rise of their civilisation, the Yanme'e came to establish colonies and interplanetary infrastructure throughout the Napret system (including on two of Palamok's moons), before ultimately being inducted into the Covenant in a brutal war. Following the Covenant's dissolution in 2552, many Yanme'e gladly returned to their homeworld and colonies in the Napret system.