Urbain Jean Joseph le Verrier, “Premier Mémoire sur la théorie d'Uranus”, in Comptes Rendus hebdomadaires des séances de l’Académie des Sciences, Paris, Bachelier, volume 21, no. 19, 1845,with Le Verrier's paper on pp 1050-1055, and offered as an extract (without the original wrappers) of the weekly issue from a larger bound volume. This is the first publication of Le Verrier's prediction for the planet beyond Uranus, the discovery of which was made the next year (1846) to 1o of where he predicted it to be. $350
“The planet Neptune was mathematically predicted before it was directly observed. With a prediction by Urbain Le Verrier, telescopic observations confirming the existence of a major planet were made on the night of September 23–24, 1846,[1] at the Berlin Observatory, by astronomer Johann Gottfried Galle (assisted by Heinrich Louis d'Arrest), working from Le Verrier's calculations. It was a sensational moment of 19th century science and dramatic confirmation of Newtonian gravitational theory. In François Arago's apt phrase, Le Verrier had discovered a planet 'with the point of his pen'.”--Wiki
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