Discovery of Neptune
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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
New Berlin Observatory at Linden Street, where Neptune was discovered observationally.
John Couch Adams
Urbain Jean-Joseph Le Verrier.
Johann Gottfried Galle, 1880
Johann Gottfried Galle
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Johann Gottfried Galle was a German astronomer from Radis, Germany, at the Berlin Observatory who, on 23 September 1846, with the assistance of student Heinrich Louis d'Arrest, was the first person to
Discovery of Neptune
…confirming the existence of a major planet were made on the night of September 23–24, autumnal equinox of 1846, 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…
Johann Galle
Memorial plaque in Wittenberg
The 9" refractor telescope which Galle used to discover Neptune