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Re: apocalypse No! : "solar system is chaotic" : Jacques Laskar, French dynamicist and astronomer
Posted:
Dec 23, 2012 8:25 PM


On Dec 23, 1:11 pm, David Bernier <david...@videotron.ca> wrote: > I was looking for more about this, which I had read about > in French. > > nonPress discussion: > > "In about 1% of the cases, the calculations lead to collisions between > planets or between a planet and the Sun in less than 5 billion years." > > They have three future orbits about 3.5 billion years in the > future. > > "7 million hours of CPU time required" ... > > Usually, Mercury's orbit's eccentricity becomes large enough > for crossing with Venus orbit (projected to a reference plane). > > Sometimes, Mars & earth projected or Venus & earth projected > orbits intersect also ... > > Nonpress discussion, detailed summary: > > http://www.obspm.fr/actual/nouvelle/jun09/colli.en.shtml > > David Bernier
Laskar et. al. built on Lyapunov's work:
http://en.wikipedia.org/wiki/Lyapunov_time
Mark L. Fergerso



