Wednesday, 12 September 2012

star - What came first: the Sun shining or the existence of helium?

The Big Bang theory predicts that (depending what assumptions you choose) the initial elements were formed from 10 seconds to 20 minutes after the Big Bang.



The initial elements were



As the linked Wikipedia article says




Essentially all of the elements that are heavier than lithium and beryllium were created much later, by stellar nucleosynthesis in evolving and exploding stars.




So the answer to your question is: the Helium came first.

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