My lord, they say five moons were seen to-night;
Four fixed, and the fifth did whirl about
The other four in wondrous motion. King John (4.2), Hubert
Although Shakespeare would have not even known the planet Uranus existed, 24 of its 27 known moons are named after his characters. Bianca and Umbriel are named after characters in Alexander Pope's Rape of the Lock and, surprisingly, John Herschel named the brightest moon of Uranus, Ariel, after the character in Pope's work, not the more famous Ariel in Shakespeare's The Tempest.