For millennia, the Sun and Moon, Mercury, Venus, Mars, Jupiter, and Saturn formed what the ancients considered to be an absolute cosmic structure of moving celestial bodies reflecting the primordial forces that governed human affairs. Then in 1781 the astronomer and musician William Herschel, while conducting an exhaustive survey of the heavens using a telescope of his own design, suddenly observed an object that was not an ordinary star. The object turned out to be the first planet to be discovered since antiquity. Herschel’s stunning discovery immediately transformed the dimensions of the known solar system, the new planet being twice as far from the Sun as Saturn. It also presented an unprecedented challenge to the astrological tradition. The ancient seven-planet hierarchy circumscribed by Saturn had been irrevocably disrupted, with no established archetypal meaning for the new planet. Contemporary skeptics viewed its discovery as having placed the last nail in the coffin of a discredited astrology whose demise had been caused by the Scientific Revolution and proclaimed by the Enlightenment. Astronomers considered several names for the new planet. Herschel first proposed the name Georgium Sidus in honor of his sovereign patron, George III of England. The French, no doubt unenthusiastic about the planetary deification of an English monarch, used the name Herschel. In the end, in keeping with the planets known to the ancients, the pantheon of classical mythology was called upon. The German astronomer Johann Elert Bode had suggested the name Uranus in the year of its discovery, and it was this name that eventually received international acceptance. The logic for naming the new planet Uranus seems to have been straightforward: The mythological Ouranos was the father of Kronos (Saturn) and thus corresponded to the location of the new planet beyond Saturn in the heavens, just as Saturn was both the father of Jupiter in mythology and the name of the next planet beyond Jupiter in the heavens. Ouranos was also the god of “the starry sky,” as Hesiod called him, thus providing what seemed to be an especially apt name for the new planet. Astrologers adopted the name Uranus as well, but the meaning they eventually came to attribute to the new planet was generally different in character from that of the mythological Ouranos. Since at least the turn of the twentieth century, the unanimous consensus among astrologers is that the planet Uranus is empirically associated with the principle of change, rebellion, freedom, liberation, reform and revolution, and the unexpected breakup of structures; with sudden surprises, revelations and awakenings, lightning-like flashes of insight, the acceleration of thoughts and events; with births and new beginnings of all kinds; and with intellectual brilliance, cultural innovation, technological invention, experiment, creativity, and originality. In addition to the occurrence of sudden breakthroughs and liberating events, Uranus transits are linked to unpredictable and disruptive changes; hence the planet is often referred to as the “cosmic trickster.”