Ethir

Ethir is a fictional planet located in the Andromeda galaxy. It is known for its unusual atmospheric composition, which gives its sky a distinctive violet hue. The planet's surface is predominantly covered by a vast, shallow ocean teeming with bioluminescent life. Large, floating islands made of a porous, mineral-rich rock drift across these oceans, supporting unique flora and fauna adapted to a semi-aquatic environment.

The dominant intelligent species on Ethir are the Lumina, a sentient, gelatinous organism that communicates through complex patterns of light emission. They have developed a sophisticated understanding of bio-engineering and utilize the planet's natural resources to create intricate, living structures. Their society is largely communal, with individuals seamlessly integrating into larger collective consciousnesses for extended periods.

Ethir's gravity is approximately 0.8 times that of Earth, and its year is considerably longer, marked by two distinct seasons: a warm, luminous period dominated by intense bioluminescence from the oceans, and a cooler, dimly lit season where the atmospheric particles are denser. The planet has a single, large moon that influences the ocean tides and the Lumina's light-based communication cycles. Scientific interest in Ethir stems from its unique biosphere and the advanced, yet alien, civilization of the Lumina.