中文摘要：

严肃的牛顿法律是在距离的即时行动的一个理论。然而，爱因斯坦一般相关性声明严肃的速度等于光的速度，它是有限的。因此，如果严肃的牛顿法律需要修正，讨论是一个相称的问题，当学习并且遵守时重力潮汐。在这份报纸，严肃的牛顿法律在一般相关性的框架是充分适用的，这被显示出。基于 Newtonian 以后近似，我们发现为严肃的速度的看得见的效果与动人的来源的速度无关，但是它依赖于它的加速。一般来说，严肃的速度的效果是那么弱的今天任何天体的观察，包括阳光潮汐的观察，不能证实重力的领域以光的速度旅行。

英文摘要：

Newton＇s law of gravity is a theory of instan- taneous action at a distance. However, Einstein＇s general relativity states that the speed of gravity equals the speed of light, which is finite. Therefore, it is a worthy problem to discuss if Newton＇s law of gravity needs modification, when studying and observing the gravitational tidal. In this paper, it is shown that the Newton＇s law of gravity is fully applicable in the framework of general relativity. Based on the post-Newtonian approximation, we find that the observable effect for the speed of gravity is irrelevant to the velocity of a moving source, but it is dependent on its acceleration. In general, the effect of the speed of gravity is so weak that today＇s any astronomical observations, including the sun tidal observations, can not confirm that the gravitational field travels at the speed of light.