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Vulcan


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Urbain Jean Joseph Le Verrier (1811—1877) French mathematician

Simon Newcomb (1835—1909)

Albert Einstein (1879—1955) German-born American theoretical physicist

 

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A hypothetical planet supposedly lying within the orbit of Mercury, invoked in 1859 by U. J. J. Le Verrier to explain the advance of Mercury's perihelion (later accounted for by S. Newcomb's improved calculation of perturbations by the other planets, and A. Einstein's general theory of relativity). It is now known not to exist.

Subjects: Astronomy and Astrophysics.


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