What is the question to: "With a prediction by Urbain Le Verrier , telescopic observations confirming the existence of a major planet were made on the night of September 23–24, 1846, at the Berlin Observatory , by astronomer Johann Gottfried Galle (assisted by Heinrich Louis d'Arrest ), working from Le Verrier's calculations."? The topic is Discovery of Neptune.
The reply is: who discovered neptune the planet?