lagrange points are what i call the seeds of the interplanetary superhighway.umber two, not only will it take you to a different place, but it'll be actually to another city. so in our case, it could be actually to another planet. starting from these lagrange points, or the equilibrium points, they generate families of periodic orbits. so these are orbits that close on themselves, and they surround the lagrange points and they get bigger, bigger, and bigger. and what happens, these are very special types of periodic orbits that are very sensitive, or people call them unstable. but this sensitive dependence is really the definition of chaos. the very first mission that used this type of very sensitive orbits, and it was called the isee-3, international sun-earth explorer 3, was launched in 1978. by using the sensitive dependence on slight changes, it was able to reorient itself, move away from the l1 lagrange point, and actually go to follow -- to study a comet. and so it's this type of sensitivity and energy savings that makes these orbits very, very powerful.