Uranus With the exception of earth, all the other planets take their names from Roman myth. Uranus is the third-largest and fourth most massive planet in the Solar System. It is named after the ancient Greek deity of the sky. Sir William Herschel announced its discovery on March 13, 1781, expanding the known boundaries of the Solar System for the first time in modern history. Uranus was also the first planet discovered with a telescope.
Home / Questions / What is the only major planet of the solar system that takes its English name from Greek mythology?