[Nature] A population of red candidate massive galaxies ~600 Myr after the Big Bang

[Shrek]

Impossible to answer, there is no mathematical mechanism that can describe such a system.

Surely one should explore possibilities and not just decide it has no solution.

I am off topic, so best I stop.

 

[lexluthermiester]

Then one asks where did the pre big-bang state come from till one is left with the claim that it has always been (that is one infinity I can't imagine)

That is an easy deduction. If we throw time in reverse, what would we get when all the mass of the Universe is clumped into one spot?

Zero point energy requires a field. No defined field, no zero point energy.

If you can't explain how a quantum field can simply arise out of nothing then any subsequent explanation that relies on this mechanism cannot be used as proof that the universe came from nothing.

Correct.

Fair enough, so let's suppose there was something before the big-bang; where did that come from?

Seriously? Do you think the Universe is all that exists and has ever existed?