He most certainly deserves credit as a pioneer, with Le Verrier, of applying perturbation theory to planetary motion. 他与勒威耶都是应用微扰理论解决行星运动问题的开拓者，毫无疑问。
These additional possibilities modify the gravitational force in a small but nonnegligible way, yielding potentially observable corrections to planetary motion. 这些额外的可能性，会以一种微小但不可忽略的方式修正重力，造成的结果有可能可以在行星运动中观测到。
