Astronomer Sir William Herschel discovered the first two moons of Uranus, Titania & Oberon.
Source
British astronomer William Lassell discovered two of Uranus' moons, Ariel and Umbriel.
Astronomer William Herschel first observed Uranus.
Saturn's moon, Enceladus, was discovered by William Herschel.
NASA's Voyager 2 came into close contact with Uranus and captured many images that uncovered 11 new moons.
William Herschel discovered the first binary star.