Ships for eternity - Perry Rhodan

Vessels of the void, round spheres like facsimiles of planets and moons. But these hulls aren't of ice and stone. Packed with the achievements of centuries of development and civilization, they hold power enough to raze entire worlds or build them anew. They are worlds onto their own, of sorts, home to entire crews that would rather spend the rest of their lives aboard vessels traveling the stars, than ground themselves on an ordinary planet. Perhaps that is why they have become so synonymous with the empire. For all the differences of its worlds, its peoples, and their cultures, the great starships are one constant, unchanging across eons. A recurring symbol of the stability and strength of this civilization, icons for the dynasty and its rule.

Perry Rhodan fanart by Martechi