Deceleration

Deceleration is the opposite of acceleration, which is the rate at which an object changes its velocity. In the context of space and astronautical engineering, deceleration is the process of reducing the speed of a spacecraft or other object in space. This can be achieved through a variety of methods, including the use of thrusters, aerobraking, or parachutes. Deceleration is a critical component of space missions, as it allows spacecraft to enter orbit around a planet or moon, land safely on a surface, or return to Earth. The amount of deceleration required depends on the specific mission objectives and the characteristics of the spacecraft and its trajectory.
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