In 3 Body’s fictional universe, far-flung theory plays out in real time in the lives of a far-away alien species and its attempts to both interact with and influence humans here on Earth. The most common sort of star is one with a stable binary partner, which makes our sun, a solo star, fairly rare. This is precisely the situation the Trisolarans face: From time to time, their three bodies stabilize for long periods, giving their civilizations enough time to rapidly advance and flourish.