Tiarris

Tiarris is a fictional planet located in the outer rim of the Andromeda galaxy. It is characterized by its predominantly arid landscape, with vast deserts and rocky plateaus making up most of its surface. The planet experiences extreme temperature fluctuations between day and night due to its thin atmosphere.

The native species of Tiarris are known as the Xylos. They are a hardy, silicon-based lifeform adapted to the harsh environmental conditions. The Xylos have developed a complex subterranean society, building intricate tunnel networks and underground cities to escape the surface heat and radiation. Their culture is deeply intertwined with the planet's geological formations and mineral resources, which they expertly mine and utilize.

Tiarris's economy is primarily based on the extraction of rare crystalline minerals, highly sought after for their unique energy-conducting properties. These minerals are traded with off-world civilizations, making Tiarris a significant, albeit remote, trading post. Despite its economic importance, the planet remains largely unexplored by other sentient species due to its challenging environment and the Xylos' reclusive nature. The Xylos have a strong tradition of oral history and a deep respect for their ancestral lands, which influences their interactions with outsiders.