Before revision: A Cycler is a spacecraft on a closed transfer orbit that passes close to two celestial bodies at regular intervals Free-return trajectory a symmetrical orbit past the moon and Earth first analysed by Arthur Schwaniger Lunar cycler A lunar cycler or Earth–Moon cycler is a cycler orbit, or spacecraft therein, which periodically passes close by the Earth and the Moon, using gravity assists and occasional propellant-powered corrections to maintain its trajectories between the two.
After revision: A Cycler is a spacecraft on a closed transfer orbit that passes close to two celestial bodies at regular intervals Free return trajectoryA free-return trajectory iswas a symmetrical orbit past the moon and Earth first analysed by Arthur Schwaniger Lunar cycler A lunar cycler or Earth–Moon cycler is a cycler orbit, or spacecraft therein, which periodically passes close by the Earth and the Moon, using gravity assists and occasional propellant-powered corrections to maintain its trajectories between the two.