Teshuun

Teshuun, formally designated Craehlil VII, is the seventh and outermost major planet of the Craehlil System in the Orion Arm of the Milky Way Galaxy, orbiting Craehlil at a semi-major axis of 14.12 AU. Classified as a rogue ice world, Teshuun is infamous for its erratic, highly elliptical orbit and its passage through the system’s distant debris fields. The planet’s surface is dominated by thick layers of frozen nitrogen, methane, and ammonia, mantled over a silicate-ice mantle and a presumed rocky core. Glacial fractures, deep impact scars, and migrating cryovolcanic vents mark a world in constant flux, with tidal and radiogenic heating occasionally triggering geyser eruptions and atmospheric haze events. Teshuun’s orbit brings it periodically close to the system’s heliopause, where solar influence wanes and interstellar cold prevails, plunging the planet into extended periods of deep freeze and atmospheric collapse.   Though uninhabitable by any known biosphere, Teshuun serves as both a scientific curiosity and a marginal resource frontier for the system’s syndicates and exploration enclaves. Historical records suggest Teshuun was once a captured object, its present instability a legacy of ancient gravitational encounters—possibly with the gas giant Ravla or a now-absent system member. Automated outposts and probe relays dot its volatile orbit, monitoring glacial chemistry, volatile transport, and the persistent risk of surface fissure venting. With no confirmed natural satellites, Teshuun remains isolated and unpredictable—a frozen anomaly, prized for its rare isotopes and as a natural outpost for monitoring the system’s outermost limits.