Planárra

Planárra is a fictional planet located in the Andromeda Galaxy. It is known for its unique geological formations and a biosphere that has adapted to extreme conditions. The planet's surface is characterized by vast, flat plains, hence its name, which is derived from the Latin word for "flat." These plains are interspersed with towering crystalline structures that are believed to be the result of a slow, ongoing geological process involving mineral precipitation from subterranean fluid flows.

The atmosphere of Planárra is rich in nitrogen and argon, with a significantly lower oxygen content compared to Earth. This has led to the evolution of life forms that utilize alternative metabolic pathways. Flora on Planárra often exhibits bioluminescent properties, emitting soft glows in the planet's dim light. Fauna tends to be slow-moving and possesses hardy exoskeletons to withstand the planet's abrasive atmospheric particles.

Water exists on Planárra primarily in a subsurface liquid state, accessible through geothermal vents that punctuate the plains. These vents also serve as focal points for biological activity. The planet experiences long, slow seasons due to its orbital eccentricity. Scientific expeditions to Planárra have been limited, but ongoing research focuses on understanding its unique geochemistry and the potential for extremophile life. The long-term habitability for non-native species remains a subject of study.