World file
Canticle
The Canticle page gathers its physical environment, climate, biosphere, habitats and unresolved research questions.
- Planetary system
- System not publicly identified
- Physical scale
- Small, slow-rotating ringed planet; about 0.7 standard gravity

Geology and terrain
A compact world shaped by heat
Canticle is a small rocky planet with rings and a surface whose usable geography shifts with the day. The boundary between darkness and dawn is its key moving landscape.
Climate and atmosphere
A thermal race around the planet
Intense sunlight heats the atmosphere and surface to destructive temperatures. Pressure and humidity changes near sunset produce a great fire cyclone.

Biosphere
Rapid growth in a narrow light window
Plants grow rapidly when reflected ring-light reaches the surface. Gazelle-like animals are known near dawn, but their survival cycle is poorly understood.
Habitats
Mobile settlements and dawn agriculture
The viable corridor lies just ahead of the dawn. Communities link vessels into mobile settlements and cultivate plants during brief safe intervals.
Open questions
How does life survive the day?
The protections used by animals, seeds and soil against daytime heat remain unknown, as does the long-term stability of the moving habitats.