Cislunar Space Circular Restricted Three-Body Problem Lagrange Points of Eccentric Two-Body System Lagrange Points of Eccentric Three-Body System Periodic Orbits Around L1 Periodic Orbits Around L2 Periodic Orbits Around L3 Prograde Periodic Orbits Periodic Orbit Insertion Trajectories Lyapunov Periodic Orbit Transfers Halo Periodic Orbit Transfers Circumlunar Trajectories