Scientists think the new tiny moon hid for so long -- even eluding the Voyager 2 spacecraft during its flyby about 40 years ago — because of its small size.

NASA scientists at the Southwest Research Institute discovered a 29th moon orbiting Uranus while using infrared detection through the Webb Space Telescope.

Scientists think the new tiny moon hid for so long -- even eluding the Voyager 2 spacecraft during its flyby about 40 years ago — because of its small size.