Dual-Spin Spacecraft

A dual-spin spacecraft uses two spinning parts that rotate in opposite directions to maintain stability and control orientation in space. One part, the rotor, spins at a constant speed, providing angular momentum, while the other, the platform, can rotate or tilt independently. This setup helps keep the spacecraft steady and precisely aimed without requiring continuous fuel. It’s like spinning a bicycle wheel: the spinning wheel resists changes to its orientation, helping the spacecraft stay stable during its mission. This design is effective for long-duration missions where maintaining a stable attitude is crucial.