1938
Technology  


The mechanism for energy production in stars is discovered.

The mechanism for energy production in stars is discovered. Classical physics cannot account for the enormous energy output of an average-sized star like our Sun. The German-born American physicist Hans Bethe explains it in terms of the theory of nuclear reactions. He calculates that the high temperature inside a star causes hydrogen nuclei to fuse into helium, releasing tremendous power for billions of years. (In the tunnel of the Cornell accelerator, 1968.)
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