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Dirk Reuyl Dirk Reuyl (1906 – 1972) was a Dutch American physicist and astronomer. He was the cousin of astronomer Peter van de Kamp. ==Life== Like his cousin, Reuijl (later "Reuyl") was born in Kampen, Overijssel. He studied physics and mathematics at Utrecht University, where, in October 1931, he defended his PhD dissertation "Photographic measures of close double stars" with Albertus Antonie Nijland as advisor.〔(Utrecht University graduation information )〕 He came to the United States a few years before Van de Kamp. He joined the staff at McCormick Observatory in 1929 and continued to work there until 1944. He originally worked on the parallax of stars, first publishing a list of 50 measurements in 1929 with fellow staff member Alexander N. Vyssotsky. In 1941 he measured angular diameter of ''Mars'' using photographic plates.
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