sentences:  Halo orbits can be thought of as resulting from an interaction between the gravitational pull of the two planetary bodies and the Coriolis and centripetal acceleration on a spacecraft.Halo orbits exist in any three-body system, e.g., the Sun–Earth–Orbiting Satellite system or the Earth–Moon–Orbiting Satellite system.Continuous "families" of both Northern and Southern halo orbits exist at each Lagrange point.