11-29-1872

Mary Somerville died in Naples, Italy. Her translation into English and expansion of Laplace's Mecanique Celeste (The Mechanism of the Heavens) in 1831 was well received. The 1842 edition of her next book posited a planet perturbing the orbit of Uranus and helped John Couch Adams discover Neptune.

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Mary Somerville
Pierre-Simon Laplace
John Couch Adams