An image of Uranus from NIRCam (Near-Infrared Camera) on the NASA/ESA/CSA James Webb Space Telescope shows the planet and its rings. (Image credit: NASA, ESA, CSA, STScI) New observations of Uranus's enigmatic outer rings have shown them to be even more mysterious than astronomers had thought, and their unusual properties hint at some puzzling things going on with the planet's system of moons. These observations suggest that small, mysterious moons with surprisingly different natures are the source of the particles that make up the two outermost rings, and that there are probably even more undiscovered moons to add to the 29 already known around Uranus. Voyager 2 captured the first images of Uranus's rings when it flew past the seventh planet from the sun in January 1986, and since then the Hubble Space Telescope and the ten-meter telescopes at W. M. Keck Observatory on Mauna Kea in Hawaii have discovered further faint rings around the ice giant, bringing the total to 13.…