In 1846, the German astronomer Johann G. Galle discovered Neptune after only an hour of searching, within one degree of the position that had been computed by Urbain-Jean-Joseph Le Verrier. Independently of the English astronomer John C. Adams, Urabain-Jean Le Verrier had calculated the size and position of a previously unknown planet, which he assumed influenced the irregular orbit of Uranus, and he asked Galle to look for it.