- Geoworms (a type of worm on the planet)
- Aard (the main city on the planet, a humoungous underground metropolis)
Solar system, moons and galaxy
Solar system: Alpha Solaranlage
Galaxy: Milky Way
The planet looks brown, with many cracks in the ground on the planet.
Most Terrageonians live underground.
It was thought to be uninhabited for years, but Zynon is the first to discover life there.