Neptune Discovered: Le Verrier Finds the Planet with Math
French mathematician Urbain Le Verrier and British mathematician John Couch Adams predicted Neptune's existence through gravitational calculations before German astronomer Johann Gottfried Galle spotted it in 1846. This triumph proved Newton's laws could map the solar system with such precision that a planet remained invisible to the naked eye yet undeniable on paper.
September 23, 1846
180 years ago
Key Figures & Places
What Else Happened on September 23
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proclamation d'Otton Ier du Saint-Empire comme roi des Lombards.
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French forces decimated an English fleet off the coast of Arnemuiden, capturing five ships and seizing a massive cargo of wool. This clash introduced gunpowder …
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