A Dyson Sphere is a massive spherical structure roughly 2 to 3 hundred kilometers in diameter with an artificial sun in the center.
The surface of a Dyson Sphere is a honeycomb structure of hexagonal Modules that all have a dome approximately 10 kilometers in diameter on their sun-ward sides. Spaceships can enter a module's waterway directly and be docked within as a seafaring vessel. The modules themselves are equipped with anti-debris magnetic shields and defense turrets on the side opposite the sun-ward side.
The existence of a Graviton Core implies that in the world of Valvrave, people have discovered and can manipulate gravitons, which would explain how artificial gravity systems on the modules of Dyson Spheres function.
- Dyson spheres are the equivalent of space colonies that are commonly found in the Gundam franchise.