NASA’s James Webb Space Telescope has found a previously unknown moon orbiting Uranus.

A team of astronomers announced Tuesday that a new satellite measuring roughly 90 football fields across was discovered around the seventh planet from the sun. The moon, which was first seen by NASA’s James Webb Space Telescope on Feb. 2, joins a busy neighborhood of 28 other known moons around Uranus.

Using the powerful James Webb Space Telescope, scientists have spotted a moon nestled near Uranus’s rings that’s so small you could walk around it