Ringworld

Ringworld was a planetary-grade megastructure around Ceal constructed during the Golden Age of Iserialogy. It was located precisely at the geostationary orbit of Ceal and was supplied with artificial gravity by means of Tertiary Iserialogy. Ringworld was shaped like a giant hollow torus that was populated on both sides. Clever optical Iserialogy was used to redirect about half of the sunlight from the outside to the inside of Ringworld, giving all locations on Ringworld a day-night-cycle matching that of Ceal.

## Astronomical Data

**Central Radius:** 38,062 km

**Average Outer Torus Radius:** 16 km

**Average Inner Torus Radius:** 15 km

**Average Circumference:** 100 km

**Volume:** 2.33×107 km3

**Mass:** 1.38×1020 kg

**Mean Density:** 5,941 kg/l

**Outer Surface Area:** 24,050,000 km²

**Inner Surface Area:** 22,550,000 km²

**Total Surface Area:** 46,600,000 km²

## Construction & Architecture

In order to withstand the cosmic forces that exist even at the point of equilibrium that is geostationary orbit, Ringworld was constructed most of Creatanium. It was connected to Ceal by three great pillars which also doubled as space elevators: Skytower Eyto on the islands east of Ventana, Skytower Keto on of the easternmost Zodiac Isles, and Skytower Fleto in the Falin Sea between Ventana and Rida.

Though completely artificial, Ringworld was modelled to look like the natural world of Ceal, and as such had rivers, mountains, lakes, oceans, plains, deserts, woodlands, as well as all the different climate zones of Ceal.

Construction of Ringworld began in 293 BN and even with the application of advanced Iserialogy took many decades to complete. Eventually, Ringworld was finished in 216 BN. It was gradually settled by immigrants from both Ceal and Feera, and soon declared independence in 187 BN when the Ilyfkilo Commonwealth was founded. Unlike Feeheira, the Ilyfkilo Commonwealth maintained friendly relations with Ceal up until Ringworld was destroyed during the First Novean War.

## Demise

The fate of Ringworld was sealed when the Goddess Nova destroyed Skytower Fleto using Minayero. Though it is theorized that Ringworld could have persisted even with only two of the Skytowers intact, the force of Nova's attack caused Ringworld to spin out of orbit, and eventually be disintegrated by gravitational forces. However, though it is generally accepted that gravitational forces can be powerful enough to destroy even Creatanium, the disintegration of Ringworld happened significantly faster than predicted by any models. It is thus commonly assumed that Nova's attack did not only destroy Skytower Fleto, but somehow propagated through the entire structure of Ringworld, somehow destabilizing the Creatanium and causing it to break within days where it would have lasted for years otherwise. This is further reinforced by the fact that Nova's attack was powerful enough to create the spatial anomaly known as Sky's Tear that surrounds the ruins of Skytower Fleto even today. This unexpected and rapid disintegration was the main reason why even despite emergency plans and advanced technology the vast majority of the population of the Ilyfkilo Commonwealth was unable to evacuate and perished together with Ringworld.

After disintegrating, much of Ringworld flew off into outer space, while some fragments rained down on Ceal, causing further destruction. However, roughly 10% of the original mass of Ringworld remains in a relatively stable orbit around Ceal that forms the beautiful ring system that among those familiar with its history is considered an ever-present graveyard and memorial of the past, known as the Ring Ruins.