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The stability of the Solar System is a subject of much inquiry in astronomy. Though the planets have been stable when historically observed, and will be in the short term, their weak gravitational effects on one another can add up in unpredictable ways. For this reason (among others) the Solar System is stated to be chaotic, and even the most precise long-term models for the orbital motion of the Solar System are not valid over more than a few tens of millions of years. The Solar System is stable in human terms, and far beyond, given that none of the planets will collide with each other or be ejected from the system in the next few billion years,〔 and the Earth's orbit will be relatively stable.〔Gribbin, John. Deep Simplicity. Random House 2004.〕 Since Newton's law of gravitation (1687), mathematicians and astronomers (such as Laplace, Lagrange, Gauss, Poincaré, Kolmogorov, Vladimir Arnold and Jürgen Moser) have searched for evidence for the stability of the planetary motions, and this quest led to many mathematical developments, and several successive 'proofs' of stability of the Solar System.〔(Laskar, J. Solar System: Stability )〕 ==Overview and challenges== (詳細は''n''-body problem. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Stability of the Solar System」の詳細全文を読む スポンサード リンク
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