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- رالف بيلكناب بالدوين (بالإنجليزية: Ralph Belknap Baldwin) هو شخصية أعمال وعالم فلك أمريكي، ولد في 6 يونيو 1912 في غراند رابيدز في الولايات المتحدة، وتوفي في 23 أكتوبر 2010. (ar)
- Ralph Belknap Baldwin (geb. 6. Juni 1912 in Grand Rapids, Michigan; gest. 23. Oktober 2010 ebenda) war ein amerikanischer Astrophysiker und Planetenforscher, der als erster nachwies, dass Mondkrater nicht vulkanischen Ursprungs sein können, sondern durch Einschläge von eingefangenen Himmelskörpern herrühren. (de)
- Ralph Belknap Baldwin (June 6, 1912 – October 23, 2010) was an American planetary scientist known for his work on lunar craters, beginning in the late 1940s. His book, The Face of the Moon made the case for the impact nature of lunar craters. He published The Measure of the Moon in 1963. Prior to his lunar work he was Senior Physicist at Johns Hopkins University's Applied Physics Laboratory during World War II working on the Proximity fuze. In 1947 he began working for Oliver Machinery Company. In 1970 he became president of the company and chairman of the board in 1982. He retired in 1984. He died on October 23, 2010. (en)
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- 6875 (xsd:nonNegativeInteger)
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- Grand Rapids, Michigan, United States (en)
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- Baldwin being interviewed in 1998 (en)
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- Grand Rapids, Michigan, United States (en)
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- Showed that lunar craters were the result of impacts, not volcanic in origin. Two of his books were highly influential and helped establish lunar timescales. (en)
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- Ralph Belknap Baldwin (en)
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- رالف بيلكناب بالدوين (بالإنجليزية: Ralph Belknap Baldwin) هو شخصية أعمال وعالم فلك أمريكي، ولد في 6 يونيو 1912 في غراند رابيدز في الولايات المتحدة، وتوفي في 23 أكتوبر 2010. (ar)
- Ralph Belknap Baldwin (geb. 6. Juni 1912 in Grand Rapids, Michigan; gest. 23. Oktober 2010 ebenda) war ein amerikanischer Astrophysiker und Planetenforscher, der als erster nachwies, dass Mondkrater nicht vulkanischen Ursprungs sein können, sondern durch Einschläge von eingefangenen Himmelskörpern herrühren. (de)
- Ralph Belknap Baldwin (June 6, 1912 – October 23, 2010) was an American planetary scientist known for his work on lunar craters, beginning in the late 1940s. His book, The Face of the Moon made the case for the impact nature of lunar craters. He published The Measure of the Moon in 1963. (en)
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- رالف بيلكناب بالدوين (ar)
- Ralph B. Baldwin (de)
- Ralph Belknap Baldwin (en)
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- Ralph Belknap Baldwin (en)
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