像一个十几岁的青年，一颗年轻的恒星——一颗才几十亿岁大的恒星是变化无常的。
Like a teenager, anadolescent star—one that is a mere billion years or so old—is volatile.
这也意味着大的恒星快速地释放大量的物质，在大规模的爆炸中燃烧自己，从而寿命短，消亡早。
That also means that massive stars live fast and die young, quickly shedding huge amounts of material and burning themselves out in what are thought to be spectacular explosions.
这是最近的蓝色光变例子，在爆炸称为一颗火热的超新星前的最后阶段的中它是一颗质量非常大的恒星。
It is the closest example of a luminous blue variable, the last phase in the life of a very massive star before it explodes in a fiery supernova.
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