Momentum exchange tethers are innovative systems designed to transfer momentum between two objects in space, typically a spacecraft and a tether. This technology uses the principles of physics to create a connection that allows the spacecraft to gain or lose speed without using traditional propulsion methods. By swinging the tether, the spacecraft can effectively change its trajectory or velocity, making it a more efficient way to maneuver in orbit. These tethers can be particularly useful for satellite operations, space debris management, and even interplanetary missions. They offer a sustainable alternative to fuel-based propulsion, potentially reducing costs and environmental impact in space exploration.