3 ms·

Helium in stars(current and past) doesn’t account for it?

• AnimalMuppet 6y ago
  That may be kind of hard to tell. Stars create helium, by fusing hydrogen. That makes it hard to tell how much helium the star started with. (Or so I suspect - I'm not an astronomer.) It's kind of like, in a dynamite factory, trying to tell if there's any dynamite left over from when they blasted to make a hole for the foundations.