Geba

Geba is a brown dwarf, a body that accumulated enough mass to compress its core but never reached the threshold for sustained fusion. Its radius of 88,971 km produces a total surface area of approximately 99.5 billion square kilometers. The eleven inhabited continents together account for less than 10% of that surface. The Uncharted alone covers over 70%. The conditions required for habitability at this scale were engineered by the Velcrith over an unknown preparatory period before any biological life existed on the surface. Eira Vey's The Parent Preceded The Children traces the planet's transformation from a cooling remnant to a habitable world.

Gravity and Orbital Mechanics

An unmodified brown dwarf of this radius would produce surface gravity dozens of times beyond what any biological system can survive. The Velcrith restructured Geba's interior over an unknown duration, converting the dense core material into a differentiated layered interior and redistributing mass from the compressed center outward into graduated density shells. This reduced gravitational acceleration at the surface without reducing the planet's volume.

The three Child stars orbit in a stabilized braid configuration, and their gravitational influence is essential. The combined tidal forces of three stellar-mass bodies in close orbit exert a persistent outward pull on Geba's upper layers, partially counteracting surface gravity in a pattern that shifts with their orbital positions. Surface gravity on Geba is not uniform. It fluctuates regionally depending on the alignment of the Children, the local thickness of the crust, and the density of the mantle beneath. Coastal and low-elevation regions experience slightly lower effective gravity than deep continental interiors, and the difference is measurable.

The result is a surface gravity that is elevated but survivable. All populations exhibit denser bone structure, thicker muscle fiber, and more efficient cardiovascular systems than a lower-gravity environment would require. Groups adapted to the most extreme conditions, such as the Ngorrhali of the stratospheric passes, represent the far end of this adaptation.

The Braid System and Illumination

Geba's three Child stars each serve a distinct function. Izhara, white-blue and closest in orbit, drives daylight and storm systems. Zhaerys, orange-red with a slower orbital period, stabilizes seasonal temperature variation. Saethern, silver and fixed above the south pole, provides permanent illumination to the southern hemisphere. The 32-hour imperial day is measured by Izhara's passage over the Geban capital of Karesh. The 520-day year is divided into 16 months alternating between 33 and 32 days, marked by the Izhara-Zhaerys eclipse cycle.

There is no global day-night cycle. Illumination varies dramatically by region, determined by the relative positions of the three Children at any given time. Some regions experience perpetual twilight. Others cycle between overlapping light sources that produce distinct color gradients across the sky depending on which stars are overhead. This variation in light conditions has shaped ecological adaptation across every continent, producing biomes defined as much by their illumination profile as by temperature or altitude.

Scale and Topography

The Geba continent, origin of the empire and center of civilization for six thousand years, measures approximately 14 million square kilometers. It is the smallest inhabited continent on the planet. Yuvaar and Jeyrha each span roughly 110 to 115 million. Ngorrhal reaches approximately 500 million. Berinu exceeds 800 million. Thazvaar, a single continuous landmass divided between its coastal and inland regions, is the largest inhabited continent at roughly 5 billion square kilometers. The Uncharted dwarfs all of them at over 72 billion, a body of land so vast that every other continent combined could fit inside it many times over.

The highest peak on the planet reaches 47,200 meters above mean sea level. The oceans are proportional to the landmasses they separate. Average depths in the confirmed bodies of water exceed 60 kilometers. The deepest surveyed trenches descend beyond 300 kilometers, far past the reach of any existing technology. Additional oceans almost certainly exist within or beyond The Uncharted, but their extent has never been established. The relay network is the only reason a civilization of this scale functions at all. Without it, the distances between continents would make unified governance, commerce, communication, and emergency response impossible.

Biodiversity and Peoples

Geba's immense scale and variable conditions support extreme biodiversity. All human ethnicities on the planet - Gebans, Thazvaaris, Yuvaaris, Ngorrhali, Jeyrhan, Berinese, Kelan, Ukhaal Walkers, and Neron - are products of regional adaptation to Geba's diverse conditions under elevated gravity. Fauna ranges from the Goldenwing birds of Yuvaar to the titanbirds, the Greater Smilohound of Ngorrhal, and the Northern Sea Phantoms of the Kelan coast. Flora includes species such as Emberbriar, adapted to the planet's variable light and gravitational conditions.

Continents