不可抗御的原因，域名改为dsyq.org/感谢收藏^_^
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-teraryorbitsinoursolarsystem
abstract
，atleastinoursis，±5x–plutosystemhavebeenmaintainedoverthe1011-yrtime-span.
1introduction
thequestionofthestabilityofoursolarsystersystem.
admp;amp;boss1996;itoamp;amp;tanikawa1999).，about±，(yoshinaga，kokuboamp;amp;makino1999).ofcoursethisstatementcannotbesimplyappliedtosystemswithstableorbitalresonancessuchastheneptune–plutosystem.
inadditiontothevaguenessoftheconceptofstability，theplanetsinoursolarsystearysystesforaperiodcoveringseveral10gyrtothoroughlyunderstandthelong-teraryorbits，sincechaoticdynamicalsystemsarecharacterizedbytheirstrongdependenceoninitialconditions.
fros(sussaryorbits，theyperforaryorbits，whichcanbeatypicalindicatoroftheinstabilitytisres(venustoneptune)，whichcoveraspanof～，butitseesalsoreroscillations.
ontheotherhand，inhisaccurateses，especiallyofskar1996).theresultsoflaskarssecularperturbationtheoryshouldbeconfirmedandinvestigatedbyfullynumericalintegrations.
inthispaperwepresentpreliaryorbits，coveringaspanofseveral109yr，andoftwootherintegrationscoveringaspanof±5x，，atleastoveratiaryorbitaleleunayelermomentumdeficit，andresultsofoursimpletime–frequencyanalysisonallofourintegrations.
insection2webrieflyexplainourdynasthatspans±5x.
2descriptionofthenumericalintegrations
（本部分涉及比较复杂的积分计算，作者君就不贴上来了，贴上来了起点也不一定能成功显示。）
weutilizeasecond-orderwisdom–holmansymplecticmapasourmainintegrationmethod(wisdomamp;amp;holman1991;kinoshita，yoshidaamp;amp;nakai1991)withaspecialstart-upproceduretoreducethetruncationerrorofanglevariables，‘warmstart’(sahaamp;amp;tremaine1992，1994).
thestepsizeforthenuparetheseintegrationssimplyintermsofstepsizes.
intheintegrationoftheouterfiveplanets(f±)，wefixedthestepsizeat400d.
weadoptgaussfandgfunctionsinthesymplecticmaptogetherwiththethird-orderhalleymethod(danby1992)smethodis15，buttheyneverreachedthemaximuminanyofourintegrations.
theintervalofthedataoutputisd(～547yr)forthecalculationsofallnineplanets(n±1，2，3)，andaboutd(～yr)fortheintegrationoftheouterfiveplanets(f±).
althoughnooutputfilteringwasdonewhenthenumericalintegrationswereinprocess，.
accordingtooneofthebasicpropertiesofsyrngulartiveerrorintotalenergybyaboutoneorderofmagnitudeormore.
relativenungularngularmomentum，respec
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