[whd23]

Not accurate. Atoms heavier than helium are created in the later stages of a star's life-cycle with those heavier than iron formed during stellar collapse. So technically the H in H₂O is older than the O.

http://aether.lbl.gov/www/tour/elements/stellar/stellar_a.html

[April Lexington]

This is only a theory. Nobody can prove any of that collapsing star stuff. Only a theory. No proof.