Massive planetary structures capable of sustaining galaxy-spanning FTL travel.
A computer the size of a planet, only limited by how quickly it can remove its heat.
A computer the size of a star, only limited by the universe itself.
Planetary Rings that not only allow access to space, but extend the size of the planet's usable space by a significant margin.
Massive rings around stars, having more than 70,000 times the livable surface of a standard planet.
