Map of heavenly bodies, including nebulae, planets and stars, by the German-British astronomer William Herschel (1738-1822). Herschel constructed several telescopes and used them to extensively study the night sky. He catalogued double stars and studied the Moon's surface, but is remembered most for his discovery of Uranus in 1781. He also discovered two satellites of Uranus (Titania and Oberon) and two of Saturn (Mimas and Enceladus). Illustration published in 1813.