James Webb Telescope Discovers Tiny New Moon Orbiting Uranus

Aug 23, 2025 - 20:00
James Webb Telescope Discovers Tiny New Moon Orbiting Uranus
A team from the Southwest Research Institute has discovered a tiny new moon orbiting Uranus using NASA’s James Webb Space Telescope. The moon, called S/2025 U1, is just 6 miles (10 kilometers) wide, too small for Voyager 2 to detect during its 1986 flyby. This discovery brings Uranus’s total known moons to 29, with S/2025 U1 orbiting 35,000 miles from the planet’s center. Scientists say its presence hints that Uranus’s crowded system of moons and rings may still hold more hidden surprises awaiting discovery with Webb’s powerful instruments.