In principle, orbits in a 3-body system are unstable when extrapolated arbitrarily far into the future. But in the case of the Earth-Moon system, it's easy to f

In principle, orbits in a 3-body system are unstable when extrapolated arbitrarily far into the future. But in the case of the Earth-Moon system, it's easy to find orbits where the "instability" grows on a timescale of years or decades, and therefore can be easily dealt with by active course corrections.