Peter Andreas Hansen
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Peter Andreas Hansen was a Danish-born German astronomer.
Peter Andreas Hansen
Gotha Observatory
Hansen's grave in Gotha
Memorial stone in Tønder in Denmark, erected in 1935
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.
Peter Andreas Hansen
…theory continued to be used with Newcomb's corrections (from the Nautical Almanac's issue for 1883), but it was eventually (as from 1923) superseded by E. W. Brown's theory. He was the first president of the Permanent Commission (1864-1868) of the Central European Arc Measurement (German: Mitteleuropäische…
Ernest William Brown, from the American Mathematical Society