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| | Bethe, Hans Albrecht (1906-) |
 | | A German-American physicist who, in 1938, worked out the details of the proton-proton chain, the main energy-producing reaction in stars less massive than the Sun, and, in the same year, with Carl von Weizsäcker, developed the theory of the carbon-nitrogen-oxygen cycle, which powers the Sun and more massive stars. |
 | | Bethe studied at the Universities of Frankfurt and Munich, where he earned his Ph.D. under Arnold Sommerfeld (1928). |
 | | At the beginning of World War II, Bethe formed a theory of the penetration of armor by projectiles, and, with Edward Teller, produced a major paper on shock waves. |
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