The typical LISA "cartwheel" orbits.
One of LISA´s key features is the set of three orbits in a near-equilateral triangular formation, described under the mission concept. The LISA orbits ensure a stable thermal environment, minimising thermal disturbances on the spacecraft and the inertial test masses. Another key technology of LISA are free-falling test masses inside each spacecraft. The test masses will be undisturbed by forces other than gravitation.