Tellus and Lyra are the Earth and the Moon respectively.

Tellus

Hours in a day:
Orbital period:
Diameter:

24
365-366 sols
12 742 km

Lyra

Hours in a day:
Orbital period:
Diameter:

655.72
27 sols
3474 km

Where the story happens

Location:
Temperature range:
Biome:

Fictional Red Sea of North America, mainly in the city of Ashunder.
12°c to 46°c
Hot desert, arid