When Was Neptune Discovered?


Quick Answer

Neptune was discovered in 1846, though not with a human eye or a telescope, but instead it was discovered using mathematics. The movements of the planet Uranus were not going according to the prediction of scientist, so it was suspected that something was affecting its orbit. Using math, John Couch Adams and Urbain Le Verrier calculated where the planet should be.

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Full Answer

A German astronomer by the name of Johann Galle used the two scientists information to plot out and find the planet in the sky. Although Galle was the one to actually find the planet of Neptune, it was Adams and Le Verrier that were credited with the discovery. Without the two men's calculations Galle would not have been able to locate the mysterious planet that was making Uranus move so strangely in the sky.

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