2 地球为什么自转?

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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2026/04/12
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2 mins read


地球为什么自转?

高中物理课后,我问老师:“为什么地球会自转?”

老师说:“牛顿也不知道,只好说,上帝蹬了地球一脚,于是地球就转了起来。”


可问题是,不止地球在自转,几乎所有天体都在自转。

那时我正在读一本科普量子力学的小书,上网去搜,得到的答案只有一句:自转是天体的自然属性。

这显然无法让我满意。


上了大学,我读了爱因斯坦的广义相对论,眼界一下子被打开。

原来万有引力,本质是时空的弯曲。爱因斯坦场方程那句名言更是刻在心里:

物质告诉时空如何弯曲,时空告诉物质如何运动。


这个问题,我前前后后想了至少十五年。

直到某一年春天,我在滨河公园散步,望着蓝天流云,一个念头忽然闯入脑海,仿佛真的是从天上飘下来的——


自转,正是由空间的扭曲引起的。

既然时空的弯曲产生了万有引力,产生了公转,那更深层的时空扭曲,便造就了自转。



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Published: 2026/04/12 - Updated: 2026/04/13
Total: 309 words


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