Wikipedia There is more information available on this subject at Psi Serpentis system on the English Wikipedia.

The Psi Serpentis system is a star system located approximately 47.9 light years from the Sol system,[1] placing it in the Outer Colonies. It is within FLEETCOM Sector Three.[2]


During the Human-Covenant war in 2543, the system was used by the Covenant as a staging area for a massive armada. As a response, Admiral Preston Cole took the Battle Group India to the system for a counterattack. On April 18, 2543, Cole's fleet arrived and the Battle of Psi Serpentis took place, over the gas giant Viperidae. The Covenant fleet was annihilated when the UNSC Everest fired all of its nukes into the planet's core, effectively turning it into a momentary star.[3]