Cosmic Exploration · discovery
Neptune
1846 · Urbain Le Verrier, Johann Galle
- Year
- 1846
Description
Found by arithmetic. Le Verrier calculated where an unseen planet must sit to explain Uranus's orbital residuals; Galle pointed a telescope there and had it within an hour, less than a degree from the prediction.
Open on the Cosmic Exploration shelf — the interactive card, the filters, and everything alongside it.