More correctly, we know where the Gold in the universe comes from, in the sense that we know what kind of nuclear reactions generate gold atoms and where such n

More correctly, we know where the Gold in the universe comes from, in the sense that we know what kind of nuclear reactions generate gold atoms and where such nuclear reactions may happen. The problem is that with our current models about the probability of such nuclear reactions and about the celestial bodies where such reactions occur, the predicted amount of gold in the universe is less than the observed amount. So there is something wrong in the theoretical models or additional observations must be made, until theory will match with observations.