Vertumna IV was a planet uncharted by humans until the arrival of the Stratospheric.
Notable features include its twin blue and yellow suns and prominence of mushroom-like trees.
| Locations | ||
| Stratospheric | Colony • Command • Engineering • Garrison • Geoponics • Living Quarters • Expeditions | |
| Vertumna | Colony Surroundings • Prosaic Plains • Subaqueous Swamp • Valley of Vertigo • Wresting Ridges | |