Reply to post: Re: Question

Re: Question

When elements coalesced from the Big Bang, (https://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis) the elements formed were Hydrogen (and isotopes), Helium (and isotopes), some Lithium-7 and some Beryllium-7. Not all these isotopes were stable, and so decayed back to Helium or Lithium.

So Population-III stars are most probably the earliest possible.