Science Memes

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We are stardust. (mander.xyz)

submitted 2 months ago by [email protected] to c/[email protected]

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[–] [email protected] 15 points 2 months ago (2 children)

If that hydrogen was previously incorporated in a star, I think it's fair to call it stardust. That's very likely, since our solar system would have formed from a relatively dense cloud of the remnants of earlier stars, with just a smidge of primordial hydrogen mixed in.

[–] [email protected] 12 points 2 months ago

grumpy I guess

[–] [email protected] 2 points 2 months ago (2 children)

Tell me more about primordial hydrogen?!

[–] [email protected] 6 points 2 months ago

All of the hydrogen was created at the initial cooling of the big bang. In this case what I mean by primordial, is that it was never part of a larger composite object like a star.

[–] [email protected] 3 points 2 months ago

It just means the remnants of the Big Bang that mostly created hydrogen, helium, and lithium. There's nothing particularly special about it other than the possibility that it is as old as creation because there are stable isotopes.