William Herschel

Discovered and the history of Uranus
Herschel discovered a few moons and even Uranus. He was the first person to actually ever discover a planet through a telescope. Usually planets are discovered in the skies, where Mercury, Mars, Venus, Jupiter and Saturn were discovered in ancient times. But this was a planet. Herschel thought it was a comet at first, but then he discovered that it was orbiting. 3 other people looked at it too. Then, Uranus was fully discovered and named a planet.

Moons he discovered

 * Titania
 * Oberon
 * Rhea
 * Mimas
 * Enceladus