Used often to describe systems in spacecrafts or satellites designed to control movement and direction. The lunar module's thrusters were critical for a safe moon landing.
Pro Tip 2/3
Not Always Loud
Thrusters like ion thrusters are quiet compared to conventional rocket thrusters, which are very loud. Despite its power, the ion thruster operated silently in the vacuum of space.
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Subtle Distinctions
Different types like 'ion', 'rocket', and 'propulsion' thrusters vary in technology and application. The spacecraft uses different thrusters for launch and for maneuvering in orbit.