We used to think a supernova was the only place that this rapid neutron capture could happen.

我们曾经认为超新星是唯一可能发生这种快速中子俘获的地方。

Multiple neutron captures enable the formation of heavier elements that a star under normal circumstances can't form, from silver to gold, past lead and on to uranium.

所以它们很容易被铁元素吸引很多中子促进了更沉的元素的形成，使得在一般情况下的恒星，不能从银变为金。