描述: 新突然亮起的恒星，其亮度比之前亮了许多倍。这个名称源自拉丁语“nova stella”，意为“新星”，在现代欧洲的早期，用来描述突然出现在天空中的明亮恒星。此外，许多不同文化观察到的新星被称为“客星”。新星的形成起源于白矮星从一个紧密的伴星中吸积气体。这些气体在白矮星的大气中积累，直到温度高到足以通过核聚变点燃为止。这种核反应火球使白矮星的亮度增加几个数量级。与Ia型超新星不同的是，白矮星在这次爆炸后保持完整。这意味着整个过程可以重新开始，新星可以重复爆发。
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核聚变
超新星
白矮星
标准烛光
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