Great Wheel
From Tardis Wiki, the free Doctor Who reference
The Great Wheel was a spaceship that was the home of the Amstron race after their home planet was lost in the early stages of the Eternal Dogfight. It was the size of a planet.
The Great Wheel possessed its own artificial atmosphere. In particular, it was safe to open doors leading to space. Transportation within the Great Wheel was often performed by means of thought controlled jet packs.
In 2015, the Great Wheel and the J'arrodic mothership approached Earth and were engaged in their eternal battle.
The Amstron sacred library, housing the Amstron Law Museum, was onboard the Great Wheel. (COMIC: The Eternal Dogfight)
