Subaru Telescope discovers the faintest moon around icy giant planets

Using some of the largest telescopes in the world, including the Subaru Telescope, a team of astronomers discovered three new natural satellites orbiting the outermost planets in our solar system--one around Uranus and two around Neptune. One of the new moons, initially detected by the Subaru Telescope, is the faintest moon ever discovered by ground-based telescopes.