Whose calculations predicted the existence of Neptune before it was seen?

Urbain Le Verrier, a French mathematician, analyzed irregularities in Uranus’s orbit and concluded that another planet must be perturbing it. In 1846 he predicted where that planet should be found, and Johann Gottfried Galle observed Neptune very close to the predicted position. The result was one of the great triumphs of mathematical astronomy. Le Verrier’s work showed that unseen celestial bodies could be inferred from gravitational effects.