Science Fiction · Misc Sci-Fi Universes

Foundation: Trantor

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The Trantor system is the ultimate culmination of Imperial engineering, operating as the central hub of galactic civilization from the dense stellar neighborhood of the galactic core.

Devoid of natural moons or gas giants, the system is defined by Trantor itself—a world-spanning ecumenopolis enclosed in a geodesic shell. It relies entirely on an endless fleet of agricultural freighters and immense artificial orbital rings to sustain its 45 billion citizens and offset its absolute thermodynamic and resource dependencies.

Celestial Bodies (6)

Sun of Trantor
star · system center · 1,391,000 km diameter
Galactic Core High Stellar Density

Positioned at the innermost navigable limit of the galactic core. The stellar density here is so extreme that the night sky is perpetually illuminated by neighboring stars, rendering true darkness virtually unknown.

Trantor
planet · orbits Sun of Trantor · 149,597,870 km · 9,800 km diameter
🪨 Terrestrial Sub-Earth Ecumenopolis

The definitive realization of an ecumenopolis. 45 billion citizens live completely subjugated by urban infrastructure, extending 80 levels beneath the planetary crust inside a planet-wide geodesic dome.

The Scar
artifact · orbits Trantor · 4,900 km · 5 km diameter
Surface Anomaly Destruction Zone

A violently forged canyon of crushed architecture measuring exactly five kilometers in width and plunging fifty levels deep. It was formed when the original orbital Star Bridge tether was severed by terrorist action.

Imperial Orbital Rings
station · orbits Trantor · 20,000 km diameter
Megastructure Logistics Hub

Three massive rings completely encircling the planet. Acting as continuous orbital spaceports, they replaced the destroyed Star Bridge to allow thousands of vessels to dock simultaneously without entering the atmosphere.

Interstellar Supply Chain
region · orbits Trantor · 30,000 km–150,000 km
Logistical Fleet Vital Supply Line

A massive, continuous swarm of tens of thousands of freighter ships. They arrive daily from 20 to 25 neighboring agricultural worlds like Neotrantor, staving off global starvation.

Hyperspace Relay System
region · orbits Sun of Trantor · 2,500,000,000 km–2,600,000,000 km
Communication Network System Boundary

A heavily guarded, spherical network of communication devices spanning the system's outer limits. It operates as the technological nervous system of the Galactic Empire.