jojodancer7237 jojodancer7237

25-01-2018
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The earliest nebulae to form in the universe were made almost entirely of

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Kalahira Kalahira

07-02-2018

hydrogen and helium, because heavier elements were synthesized in stars that had not yet appeared. There were also trace amounts of deuterium, lithium, beryllium and boron, but practically no elements heavier than those.

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