Οὐρανός

Ouranos — Uranus — was the primordial Greek god of the sky, the first ruler of the cosmos in Hesiod's Theogony, composed around 700 BCE. He was both the sky itself and its personification: he lay upon Gaia, the earth, and from their union came the Titans, the Cyclopes, and the Hundred-Handed Ones. Ouranos imprisoned his monstrous children inside Gaia's body until Kronos, the youngest Titan, castrated his father with a sickle and seized power. The name Ouranos simply meant 'sky' in Greek, possibly from a Proto-Indo-European root *wers-, 'to rain.'

On March 13, 1781, the German-born British astronomer William Herschel, observing from his garden in Bath, England, spotted an object he initially took for a comet. Further observation revealed it was a new planet — the first discovered in recorded history, since all others had been known since antiquity. Herschel proposed naming it Georgium Sidus, 'George's Star,' in honor of his patron King George III. The French, at war with Britain, refused. The German astronomer Johann Elert Bode suggested Uranus, following the mythological pattern: Saturn was Jupiter's father, so the next planet outward should be Saturn's father — Uranus, the sky.

The name took decades to become standard. British almanacs used 'Georgium Sidus' or simply 'Herschel' into the 1850s. But Uranus eventually won, and the pattern of classical mythology naming prevailed. The planet is peculiar: it rotates on its side, with an axial tilt of 98 degrees, likely the result of a massive collision early in the solar system's history. It was the first planet found with a telescope, and its discovery doubled the known size of the solar system overnight.

Uranium, element 92, was discovered by Martin Heinrich Klaproth in 1789 — just eight years after Herschel found the planet — and named in its honor. The element sat unremarked in the periodic table for 150 years until Otto Hahn and Lise Meitner split its atom in 1938, releasing the energy that would build both nuclear power plants and nuclear weapons. The sky god's name, through the planet, reached the most destructive and most generative force humans have ever harnessed.