science · 23 September 1846 · 179 years ago
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.
OnThisDay.net