They've got lots of free neutrons floating around so every so often a nucleus can grab one, it decays into a proton and becomes a slightly heavier element.

他们有很多自由中子漂浮在周围， 所以原子核偶尔会抓住一个中子，它衰变成质子并变成稍重的元素。

Unsurprisingly, neutron stars are full of neutrons and if two neutron stars come close enough together, spiral together and merge, they release tidal waves of these free neutrons.

毫不奇怪，中子星充满了中子， 如果两颗中子星靠得足够近，盘旋在一起并合并， 它们就会释放出这些自由中子的潮汐波。

And one place that we find it is in a supernova, the explosive end of a massive dying star, which is full of free neutrons and a whole bunch of stellar junk.

我们发现它的一个地方是超新星，一颗巨大的垂死恒星的爆炸端，它充满了自由中子和一大堆恒星垃圾。