31 宇宙膨胀史

毕苏林
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爱科学,也爱文艺;重逻辑,也重情感。以最硬核的科幻为壳,写最柔软的人间故事。愿以文字为桥,结识品味相投的读友。
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2026/04/15
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1 mins read


宇宙的膨胀史,可以大致分为四个关键阶段:

1. 暴涨期(10⁻³⁶秒 → 10⁻³²秒)
宇宙在远小于一瞬的时间里,以远超光速的速度膨胀了至少10²⁶倍。这解决了宇宙均匀性等难题,并为结构形成种下了量子涨落的种子。
2. 减速膨胀期(约10⁻³²秒 → 约60亿年前)
暴涨结束后,宇宙充满物质和辐射。引力的拉拽让膨胀速度持续减慢。这段时间里,原子、恒星、星系先后诞生。
3. 加速膨胀期(约60亿年前 → 今)
暗能量开始占主导,它产生“反引力”效应,推动膨胀重新加速。星系彼此加速远离,这是我们当前所处的阶段。
4. 未来可能(仍有争议)
主流预测是持续加速直至“热寂”;但韩国团队等最新研究暗示,暗能量可能已开始衰减,膨胀或许已转入新的减速期。这有待验证。

简言之:暴涨 → 刹车 → 再次油门。而“再次油门”的力度是否正在减弱,正是目前宇宙学的前沿谜题。


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