Xtól

Xtól is a fictional celestial body within the Kaelen star system, located in the Andromeda galaxy. It is primarily known for its unique geological composition, which consists of a high concentration of crystalline structures that emit a faint bioluminescent glow. This phenomenon is believed to be caused by interactions between the planet's core and exotic atmospheric gases.

The surface of Xtól is characterized by vast, undulating plains of these crystals, interspersed with deep canyons carved by ancient, now-dormant rivers of liquid methane. The atmosphere is thin and composed mainly of nitrogen and argon, with trace amounts of gases not found on Earth. Temperatures on Xtól are extremely low, far below freezing point for water.

Despite its harsh environment, Xtól is theorized to harbor subsurface microbial life. These hypothetical organisms are thought to subsist on chemosynthesis, utilizing the planet's geothermal energy and mineral resources. No direct evidence of life has been found, but the unique chemical signatures detected in atmospheric samples remain a subject of ongoing scientific interest.

Xtól's orbit is relatively stable, though it experiences occasional gravitational shifts due to the presence of a large, rogue asteroid belt on its outer periphery. These shifts can cause minor seismic activity across the crystalline plains. Exploration of Xtól has been limited to robotic probes, which have transmitted valuable data but have been unable to withstand the extreme conditions for extended periods.