Johann Gottfried Galle

Johann Gottfried Galle was a German astronomer born in 1812, best known for discovering the planet Neptune in 1846. Using predictions based on mathematical calculations by Urbain Le Verrier, Galle and his colleague Heinrich d’Arrest observed Neptune near the position they expected, confirming its existence. This discovery was significant because it was the first planet found through mathematical prediction rather than direct observation. Galle’s work contributed to the development of modern astronomy, demonstrating how careful calculations can lead to new celestial discoveries.