The outer reaches of our solar system just got a little more crowded, with astronomers spotting a previously unseen moon circling Uranus using the James Webb Space Telescope.

“No other planet has as many small inner moons as Uranus, and their complex inter-relationships with the rings hint at a chaotic history that blurs the boundary between a ring system and a system of moons,” SETI Institute researcher Matthew Tiscareno said in a statement for NASA.