biography
| sex:
| male
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| lived:
| (1901–95)
|
| biography:
| Astronomer, born in Kampen, The Netherlands. He studied at Utrecht University, in 1923 emigrated to the USA, and worked at the Lick Observatory, CA, and at Virginia University. He became director of the Sproul Observatory in 1937, and professor at Swarthmore College, PA, retiring in 1972. His best-known work began in the 1960s with his deduction that some stars, other than the Sun, possess planets; several examples were discovered in the 1990s. |
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