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我们早就知道,地球的自转越来越慢。那颗著名彗星的教父,18世纪初创建英国皇家天文学会的的埃德蒙·哈雷注意到,记载中的古代日食的位置,与他根据当时地球自转速度预测的日食的可见区域之间,存在着系统的差异。哈雷的计算后来被修改及重新分析过,从而发现,日食记录表明,在过去的几千年间,地球自转大约每百年慢2毫秒。哈雷未能找到正确的原因来解释地球自转的减慢。18世纪后期,博学的伊曼努尔·康德认为,地球自转速度的减慢是由于月亮。他提出,是潮汐摩擦使地球的自转慢了下来。在
We have long known that Earth’s rotation is slower and slower. Edmund Halle, the godfather of the famous comet, who founded the Royal Astronomical Society of England in the early 18th century, noticed that the location of the ancient solar eclipses in the record, in contrast to the visible area of the solar eclipse predicted by him at that time, , There are systematic differences. Harley’s calculations were later revised and reanalyzed to find that the solar eclipse records showed that in the past few thousand years Earth’s rotation was about 2 milliseconds slower per 100 years. Halley failed to find the right reason to explain the slowing of Earth’s rotation. In the late eighteenth century, learned Immanuel Kant believed that the slowing of Earth’s rotation was due to the moon. He proposed that the tidal friction slowed the Earth’s rotation. in