The Complete Book of 100,000 Reasons Why
Favlit. ten thousand reasons why
为什么恒星会演变成白矮星？
1、恒星通过核聚变产生能量，当燃料（主要是氢和氦）耗尽时，核心不再产生足够的压力来抵抗自身的引力，导致核心收缩。
2、核心收缩时温度和压力急剧升高，外层的氢和氦开始在外围层进行核聚变，产生更多的能量。
3、外层膨胀并冷却，形成红巨星，此时恒星体积变得非常巨大，但核心却变得非常致密。
4、红巨星的外层物质最终被抛射出去，形成行星状星云，剩下的核心则因为引力收缩而变得非常小且致密。
5、核心的半径和质量逐渐稳定，最终形成白矮星，这是一种非常致密且不再进行核聚变的天体。
总之，恒星演变成白矮星是一个从核聚变到引力收缩的过程，最终形成一种稳定但不再发光的天体。
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