Johann Gottfried Galle

Johann Gottfried Galle
Born(1812-06-09)9 June 1812
Died10 July 1910(1910-07-10) (aged 98)
Alma materUniversity of Berlin
Known forDiscovery of Neptune
AwardsLalande Prize (1839)
Scientific career
FieldsAstronomy
InstitutionsBerlin Observatory
University of Breslau
Signature
Johann Gottfried Galle, 1880
Memorial plaque in Wittenberg

Johann Gottfried Galle (9 June 1812 – 10 July 1910) 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 view the planet Neptune and know what he was looking at. Urbain Le Verrier had predicted the existence and position of Neptune, and sent the coordinates to Galle, asking him to verify.[1] Galle found Neptune in the same night he received Le Verrier's letter, within 1° of the predicted position. The discovery of Neptune is widely regarded as a dramatic validation of celestial mechanics, and is one of the most remarkable moments of 19th-century science.

  1. ^ "Urbain-Jean-Joseph Le Verrier". Encyclopædia Britannica. March 7, 2021. Retrieved June 27, 2021.