| 21. | Accurate measurements, beginning in the early 1970s, have detected nucleosynthesis in supernovae.
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| 22. | :: Have a look at stellar nucleosynthesis.
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| 23. | This evidence bolstered the hypothesis that heavier elements are the product of nucleosynthesis in stars.
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| 24. | :Theoretically all heavy elements are derived from lighter elements ( see Supernova nucleosynthesis ).
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| 25. | Planetary nebulae play a crucial role in the heavy elements and other products of nucleosynthesis.
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| 26. | In 1967, Bethe was awarded the Nobel Prize for this work on stellar nucleosynthesis.
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| 27. | Citations are in the Nucleosynthesis section below.
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| 28. | Asked how long the entire process of primordial nucleosynthesis had taken, Alpher answers 300 seconds.
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| 29. | Calcium is produced in supernova nucleosynthesis.
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| 30. | The most important fusion process in nature is the one that powers stars, stellar nucleosynthesis.
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