Brin 2: Brin 2 is the station that carries the uplift project to Kern's World, a ring of life and science around a central needle. A saboteur destroys it on the day the project begins, and Doctor Avrana Kern escapes in its Sentry Pod.
Earth: Earth is the home world of the human race, twenty light years from Kern's World. By the time the ark ship Gilgamesh reaches the green planet, Earth is poisoned, frozen and silent.
Fungus World: A planet with grey fungal growth from pole to pole, where an Old Empire terraforming project was abandoned before completion.
Kern's World: Kern's World is the terraformed planet twenty light years from Earth where Avrana Kern's uplift experiment ran after her monkeys burned up in its atmosphere. Its forest became the home of an intelligent spider civilization.
Second Brin Sentry Habitat: The sentry pod orbited Kern's World and broadcast questions to the planet below as part of the Exaltation Program. It held the uploaded mind of Doctor Avrana Kern and the expert system called Eliza until the Gilgamesh's drones destroyed it.
Seven Trees: Seven Trees is a spider city built through a thicket of interlinked trunks and silk lines. An ant army burns it, and generations later it is the city where Fabian wins legal standing for males.
The Gilgamesh: The Gilgamesh is an ark ship that carries five hundred thousand humans in suspension from a dying Earth. After its systems fail during its return to Kern’s World, its surviving passengers settle there with the planet’s spider civilization.
The Great Nest by the Western Ocean: Great Nest is the largest spider settlement on the green planet, built through a forest and out over the western ocean. Its silk structures, farms, temples and ant colonies support a complex city society.