Arvellia

Arvellia is a fictional planet within the Andromeda Galaxy, known for its unique bioluminescent flora and fauna. The planet orbits a binary star system, which contributes to its unusual day-night cycles and the widespread adaptation of bioluminescence among its inhabitants. Arvellia's atmosphere is rich in nitrogen and oxygen, with trace amounts of gases that give its skies a perpetual twilight hue. The terrain is characterized by vast, crystalline forests and deep, glowing canyons.

The dominant sentient species on Arvellia are the Lumina. These beings possess a translucent exoskeleton that allows their internal bioluminescent organs to be visible, communicating through intricate light patterns. They are known for their advanced understanding of bio-engineering and their peaceful, communal society. The Lumina have developed technology that harnesses the planet's natural light sources for energy and sustenance.

Arvellia's ecosystem is highly specialized. Many plants emit light to attract pollinators, while some animals use bioluminescence for camouflage, hunting, or mating rituals. The planet's oceans are filled with glowing plankton and large, phosphorescent sea creatures. Research expeditions from various interstellar civilizations have visited Arvellia, primarily for its biological wonders and the Lumina's unique insights into bio-technology. The planet is considered a protected biosphere by many galactic councils, with strict regulations on off-world interference.