White dwarves are the remnants of stars like our sun that start to cool.
白矮星是恒星的残余，已经开始降温了，我们的太阳就是如此。
Agol suggests we survey the 20, 000 white dwarves closest to Earth. Finding a planet would give us a good place to look for life.
艾戈建议观察离地球最近的20000颗白矮星，只要能在它们周围找到行星，就可能在行星上找到生命迹象，也就可能让它成为下一个“地球”。
Since white dwarves have no fuel left for fusion, they grow cooler and cooler over billions of years to become black dwarves too faint to detect.
随着白矮星变得没有剩余的燃料用于聚变，它们会在之后的几十亿年中越来越冷，而成为难以被探测到的黑矮星。
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