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Discovery > Neptune I


Credit : IMCCE-BDL
Orbits of Uranus and Neptune with real positions of these planets between 1800 and 1850

Because of the large gap between the observed and the calculated positions of Uranus, Le Verrier in France and Adams in UK tried to explain it by the existence of an unknown planet.

Adams will not be considered and reach a result after Le Verrier. The German astronomer Galle made the observation of the new planet at the position predicted by Le Verrier on September 23, 1846.