Attitude control is the process of changing or stabilizing an object’s orientation—such as which direction it points—without necessarily changing its location or direction of travel. In spacecraft, it can use thrusters, reaction wheels, or other actuators, guided by sensors and a control system.
It matters wherever orientation affects safety or performance. A spacecraft may need to point an antenna or instrument accurately; a vehicle using directed gas jets could use them to influence its orientation as well as its motion. In cybersecurity, attitude-control systems can be targets for interference or unauthorized commands: defenders protect their sensors, command links, and control software to prevent an attacker from changing how a platform points or stabilizes.