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  • Jennifer Shepherd

    German observatory astronomer Johann Gottfried Galle discovered the planet Neptune. He was assisted by Urbain Jean Joseph Le Verrier, a French mathematician who specialized in celestial mechanics. Neptune was named by Le Verrier after the Roman mythological god of the sea.

  • Mona Evans

    Johann Gottfried Galle (1812-1910). Based on the calculations of Urbain Le Verrier, Galle and his assistant Heinrich Louis d'Arrest at the Berlin Observatory found the planet Neptune. The orbit of Uranus wasn't quite fitting the expected one and Le Verrier thought it was because the gravity of an unknown planet was affecting it. (Portrait: Olga Radomsky) ©Mona Evans, "Neptune Facts for Kids"

  • Sarah Gregor

    Johann Gottfried Galle (9 June 1812 – 10 July 1910) was a German astronomer 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. He used the calculations of Urbain Le Verrier to know where to look.

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