作者君在作品相关中其实已经解释过这个问题。
不过仍然有人质疑——“你说得太含糊了”，“火星轨道的变化比你想象要大得多！”
那好吧，既然作者君的简单解释不够有力，那咱们就看看严肃的东西，反正这本书写到现在，嚷嚷着本书bug一大堆，用初高中物理在书中挑刺的人也不少。
以下是文章内容:
long-term integrations and stability of planetary orbits in our solar system
abstract
we present the results of very long-term numerical integrations of planetary orbital motions over 109 -yr time-spans including all nine planets. a quick inspection of our numerical data shows that the planetary motion， at least in our simple dynamical model， seems to be quite stable even over this very long time-span. a closer look at the lowest-frequency oscillations using a low-pass filter shows us the potentially diffusive character of terrestrial planetary motion， especially that of mercury. the behaviour of the eccentricity of mercury in our integrations is qualitatively similar to the results from jacques laskars secular perturbation theory . however， there are no apparent secular increases of eccentricity or inclination in any orbital elements of the planets， which may be revealed by still longer-term numerical integrations. we have also performed a couple of trial integrations including motions of the outer five planets over the duration of ± 5 x 1010 yr. the result indicates that the three major resonances in the neptune–pluto system have been maintained over the 1011-yr time-span.
1 introduction
1.1definition of the problem
the question of the stability of our solar system has been debated over several hundred years， since the era of newton. the problem has attracted many famous mathematicians over the years and has played a central role in the development of no