题目

英语翻译
So far our study of planetary orbits has been restricted to two-body central forces.However,the solar system is not a two-body system because the planets exert gravitational forces on one another.Although the interplanetary forces are small in magnitude in comparison to the gravitational force of the Sun,they can produce measurable effects.For example,the existence of Neptune was conjectured on the basis of a discrepancy between the experimentally measured orbit of Uranus and the predicted orbit calculated from the known forces.

提问时间：2020-07-18

答案

到目前为止,我们对行星轨道的研究仅限于二体中心力.但太阳系系统并不是一个二体的系统,因为行星之间彼此都有引力.尽管对比太阳的引力来说,行星之间的引力级别很小,这种引力足以产生很重大的影响.例如,海王星的存在一开始就是基于实验测量的天王星与由已知引力计算而预测的行星轨道之间的差异而被发现的
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