Xyon

Xyon (Mikaean: ) is the homeworld of the Mikaeans, and the capital of the Xyon Directorate. It is the most populous world in the galaxy, and the center of Mikaean culture and civilization. Settled by Mikael O'Neill, the father of the Mikaeans, and the first generation of Mikaeans born back on Earth, Xyon holds a special place in the hearts of Mikaeans throughout the galaxy. The majority of the planet surface is covered by urban sprawl and arcologies constructed over the last twelve thousand years, and is home to more than five trillion Mikaeans.