The Three-Body Problem Theory is a concept that was first proposed in the 17th century by Issac Newton. It is an orbital mechanics problem of predicting the motion of three objects interacting with one another under their mutual gravitational influence. In other words, it attempts to solve for the trajectories of three massive objects in space as they change according to their mutual gravitational attraction. This problem is particularly challenging because its solution requires taking into account the interactions of all three objects at once. This is unlike the two-body problem, which only involves two objects and can more easily be solved.
The Three-Body Problem has been studied by many scientists and mathematicians through the centuries and remains one of the most famous unsolved problems in physics. It was crucial in the development of Chaos Theory and it has been instrumental in the study of the motions of moons around planets, the formation of galaxies, and the stability of the solar system. It is also of great interest to astrophysicists and astronomers who use the solutions to this problem to better understand the motion of stars and planets.