Astrophysics (Index)About

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

Further reading: