In the Name of the Moon
The Caverns of Usa
Anthologica Universe Atlas / Universes / Rireinuverse / Rireinu: the flowering worlds / Daughters of Ano / In the Name of the Moon

Usamivi Province of Rireinu consists of Usa, the sole natural satellite of Rireinu, the Rireinukave homeworld. Usa is tidally locked with Rireinu. Like Earth's Moon, Usa is a lifeless ball of rock, pockmarked with myriads of craters.

All the settlements of Usa are underground, excavated into solid rock. The oldest and largest of them is the city of Usamivi, the provincial capital. It was founded in 2595ye., a mere 15 years after the first Rireinukave landed on Usa. The population of Usamivi was 200,357 in the 2761ye. census, and that of the entire Usamivi province was 1,402,539. The mean radius of Usa is 1,735.84km and equatorial surface gravity is 1.622 m/s2 (0.1654g).

The local day of Usa lasts 30pa. but the whole of Usa runs on Haru time: the lights in the public caverns are dimmed at 0ru00 and turned back up to full brightness at 5ru00 Haru Standard Time. If you asked the average Usakave whether it was light or dark up on the surface, she wouldn't be able to tell you without looking it up first.

The settlements of Usa are connected to each other and to spaceports, mines, isolated industrial establishments, and military bases by an efficient network of railways and a basic but serviceable network of roads.