The “aerial moon of Uranus” refers to Ariel, one of the planet’s major moons. Ariel is notable for its bright, geologically young surface, which is crisscrossed by deep canyons (grabens) and steep scarps. These features indicate significant past geological activity, possibly driven by internal heating and the presence of a subsurface ocean composed of water mixed with ammonia or other volatiles. Recent research suggests that fluid flows and cryovolcanism may have reshaped Ariel’s surface, producing its dramatic and complex landscape. The moon was discovered in 1851 by William Lassell and is named after a character in William Shakespeare’s The Tempest, consistent with Uranus’s tradition of naming moons after characters from works by Shakespeare and Alexander Pope.