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-termintegrationsandstabilityofplanetaryorbitsinoursolarsystem

    abstraentsoftheplanets，henuallyitisnoteasytogiveaeaningfuldefinitionofthestabilityofoursolarsystem.

    amongmanydefinitionsofstability，herehereinthesystem，startingfromabers，.

    1.2previousstudiesandaimsofthisresearshopartlyunderstoodasbeingaresultofresonanurray&holmanlean2001).ho，manyofthepreviouslong-termnumerian&hie-sainstableover1010yr，edfoursimilarexperimentsontheorbitalmotionofsevenplanets(venustoneptune)，ootherintegrationseforallintegrationsismorethan5yr，ofthefundamentalintegrationsisthatsolarsystemplanetarymotionseemstobestableintermsofthehillstabilitymentionedabove，atleastoveratime-spanof±ually，inouumeriregionbothintimeandfrequenplefiguresasevidenistabilityofsolarsystemplantion4goesontoadisvariationofplanetaryorbitsusingaloealsodisstabilityoftheplanetarymotionanditspossibleerieri&holmankinoshita，yoshida&nakai1991)hiostplanet(merinationofstepsize，isdom(1988，7.2d)andsaha&tremaine(1994，225/32d).ithastepsizeof400d，1/10.irresultseemstobeauerplyintermsofstepsizes.

    intheintegrationoftheouterfiveplanets(f±)，iththethird-orderhalleymethod(danby1992)numberofmaximumiterationshenthenumerioredetail.

    2.4errorestimation

    2.4.1relativeerrorsintotalenergyandangularmomentum

    aplestart，arearaynotbeagoodmeasureo

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