Astronomers using the James Webb Space Telescope have found an unknown moon orbiting Uranus, bringing the planet’s total to 29 — and more likely remain undiscovered.

Over millions of years, Uranus’s inner moons may have collided and spread out into rings. As the material in the rings diffused, they moved farther away from the planet. Eventually, that material can start to accumulate, recycling itself back into a moon.

NASA’s James Webb Space Telescope has uncovered a small moon quietly circling Uranus, a world already known for its unusual tilt, faint rings, and puzzling family of satellites. The discovery, announced by researchers at the Southwest Research Institute (SwRI),