Heinrich Louis d'Arrest
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Heinrich Louis d'Arrest was a German astronomer, born in Berlin. His name is sometimes given as Heinrich Ludwig d'Arrest.
Heinrich Louis d'Arrest
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
Heinrich Louis d'Arrest
…born in Berlin. His name is sometimes given as Heinrich Ludwig d'Arrest. While still a student at the University of Berlin, d'Arrest was party to Johann Gottfried Galle's search for Neptune. On 23 September 1846, he suggested that a recently drawn chart of the sky, in the region of Urbain Le Verrier's predicted location…
Johann Galle
Johann Gottfried Galle, 1880
Memorial plaque in Wittenberg
The 9" refractor telescope which Galle used to discover Neptune