Inertia
Inertia is the resistance of an object to any change in its motion, including changes to its speed and direction. In space and astronautical engineering, inertia plays a crucial role in the design and operation of spacecraft. The lack of air resistance in space means that spacecraft will continue to move in the same direction and at the same speed unless acted upon by an external force. This means that spacecraft must be designed to withstand the forces of acceleration and deceleration, as well as the forces of gravity and other celestial bodies. Inertia is also important in the navigation of spacecraft, as it affects the trajectory and course corrections necessary to reach a destination.
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