Warstar Battlestation

A proposed design from the 2900s for a vast mobile fortress the size of a small moon, with unimaginable power and weaponry. The design was also unimaginably expensive to build and maintain, and of only limited use as it could not possibly fit into a Hyperspace Field and therefore unable to make interstellar journeys.

Regarded as much too vulnerable and not at all cost-effective - these were never built.