Warp capable planet with a thriving metropolis civilization. It was home to an incredibly advanced society - technologically and medically speaking. The Titan Ares lived there under the guise of Samirsera, the Prime Minister. He stated that he had gone to live there after the rest of his kind had faded away.

Arx Stellaris IV was attacked by the Zeus controlled USS Gilbert and called for Starfleet assistance. There the crew witness and battle between Zeus and Ares, before the fight was carried off world.