  What is the origin of macroscopic randomness (uncertainty)? This is one of
the most fundamental open questions for human being. In this paper, 10000
samples of reliable (convergent), multiple-scale (from 1.0E-60 to 100)
numerical simulations of a chaotic three-body system indicate that, without any
external disturbance, the microscopic inherent uncertainty (in the level of
1.0E-60) due to physical fluctuation of initial positions of the three-body
system enlarges exponentially into macroscopic randomness (at the level O(1))
until t=T*, the so-called physical limit time of prediction, but propagates
algebraically thereafter when accurate prediction of orbit is impossible. Note
that these 10000 samples use micro-level, inherent physical fluctuations of
initial position, which have nothing to do with human being. Especially, the
differences of these 10000 fluctuations are mathematically so small (in the
level of 1.0E-60) that they are physically the SAME since a distance shorter
than a Planck length does not make physical senses according to the spring
theory. It indicates that the macroscopic randomness of the chaotic three-body
system is self-excited, say, without any external force or disturbances, from
the inherent micro-level uncertainty. This provides us the new concept
"self-excited macroscopic randomness (uncertainty)". In addition, it is found
that, without any external disturbance, the chaotic three-body system might
randomly disrupt with the symmetry-breaking at t=1000 in about 25% probability,
which provides us the new concepts "self-excited random disruption",
"self-excited random escape" and "self-excited symmetry breaking" of the
chaotic three-body system. It suggests that a chaotic three-body system might
randomly evolve by itself, without any external forces or disturbance.
