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Lyapunov time

(timescale over which a dynamical system is chaotic)

The Lyapunov time of a dynamical system is the timescale over which it is chaotic. An example of such a system in astronomy is a system of orbiting bodies, such as the Earth and the Moon. The Lyapunov exponent is its inverse.

Some calculated examples:

solar system50 million years
Pluto's orbit20 million years
Kepler 36 (star system)3000 days

(physics,dynamics,mathematics,chaos,timescale)
Further reading:
https://en.wikipedia.org/wiki/Lyapunov_time

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