It won't collide, the three stars won't, but it may collide with the three-person planet.

The three-body galaxy in the novel should be a very stable system.

If you want to ask why the technology of three-body galaxy is so advanced, the motion law of three-body galaxy has not been analyzed. Then I can only say that in the continuous period of the existence and development of the three-body to the imminent extinction, it is still too short for the whole regular three-body movement to analyze its laws.