Seligh

Seligh is a fictional planet located in the fictional Xylos sector of the Andromeda Galaxy. It is known for its unique bioluminescent flora and fauna, which illuminate the planet's surface during its extended periods of twilight. The planet's atmosphere is rich in nitrogen and oxygen, with trace amounts of a unique gas that contributes to the bioluminescence of its indigenous life. Seligh's gravity is approximately 0.8 times that of Earth.

The dominant intelligent species on Seligh are the Lumina, a sentient, silicon-based lifeform. The Lumina are known for their intricate crystal-like exoskeletons and their ability to communicate through a complex series of light pulses and subtle harmonic vibrations. They have a deeply spiritual connection to their planet and its natural cycles, living in harmony with the bioluminescent ecosystem. Their society is communal, with a strong emphasis on collective well-being and artistic expression, particularly through the manipulation of light and sound.

Seligh's geography is characterized by vast, glowing forests, phosphorescent oceans, and mountain ranges that shimmer with embedded minerals. The planet experiences a long, slow rotation, resulting in prolonged periods of daylight and twilight, with shorter, infrequent periods of complete darkness. These conditions have shaped the evolution of its lifeforms, leading to the widespread adaptation of bioluminescence for navigation, communication, and energy production. The Lumina have developed advanced technologies based on bio-integration and light manipulation, though they largely shun heavy industrialization.