[Strategia_In_Ultima]

At least the ability to mod it in.

Or you could program in "gravitational pull" of objects, that is measured in kT. That way, when your ship/base gets too close to a stellar object, it cannot escape its gravity anymore, and plummets to its death. This pull would also affect moons, and they would have a high kT rating (say, 500TT (TeraTons)).

edit: And btw, why is a simple ship bridge 10,000,000 kilograms in weight? Why is a fighter cockpit one million kilograms? Why are fighters the weight of a fair asteroid?