Spacecraft control is the academic field and engineering discipline dedicated to regulating the behavior and state of a spacecraft to achieve desired mission objectives. This research area investigates the theoretical foundations, design methodologies, implementation techniques, and operational strategies for systems that determine and adjust a spacecraft's attitude, position, trajectory, and internal functions. Key characteristics involve the synthesis of navigation, guidance, and control principles, often incorporating complex dynamic modeling, disturbance rejection, state estimation, and autonomous decision-making algorithms. Its significance is fundamental to enabling successful space missions by ensuring the spacecraft operates within specified parameters, maintains stability, and performs required maneuvers or functions reliably throughout its operational lifespan.