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月亮是否旋转?有趣的事实一目了然 - Practical Tips

月亮是否旋转?有趣的事实一目了然

by Pramith

月球总是围绕自己旋转。但是如果你在一个晴朗的夜晚观察星空,你总是会从同一侧看到天体。这方面的原因是一个令人兴奋的现象,称为约束性旋转。

月球围绕自己旋转–也围绕地球旋转

几千年来,月球一直让人类着迷。它是离地球最近的天体,在晴朗的天空下可以用肉眼观察。

  • 月球绕地球运行27天7小时43.7分钟。当它这样做时,它从西向东移动,并同时旋转自己。
  • 在月球绕地球运行的过程中,它完全围绕自己旋转一次。这意味着我们总是看到月亮的同一面。这给人的印象是天体根本没有旋转。
  • 这种现象是由于地球所施加的潮汐力造成的。在数百万年的时间里,这些越来越多地减缓了月球自身的旋转,因为它在45亿年前形成后的旋转速度比今天快得多。
  • 因此,月球自身的旋转已经适应了围绕地球的轨道周期。
  • 尽管有约束性的旋转,我们还是看到了一半以上的月球表面,大约60%。这是因为月球是在一个椭圆轨道上。因此,它有时转向较西的一面,有时转向较东的一面,面向地球。

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