Ernest William Brown
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Ernest William Brown FRS was an English mathematician and astronomer, who spent the majority of his career working in the United States and became a naturalised American citizen in 1923.
Ernest William Brown, from the American Mathematical Society
Peter Andreas Hansen
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Peter Andreas Hansen was a Danish-born German astronomer.
Ernest William Brown
…continued with his studies of the lunar theory, and made a thorough review of the work of earlier researchers, such as Hill, de Pontécoulant, Delaunay and Hansen. His mastery of the field was shown by the publication of his first great work, An Introductory Treatise on the Lunar Theory, in 1896, when Brown was…
Peter Andreas Hansen
Gotha Observatory
Hansen's grave in Gotha
Memorial stone in Tønder in Denmark, erected in 1935