Devices or engines that push or propel something forward with force, especially rocket engines on spacecraft.
From 'thrust' (to push forcefully), from Old English 'thystan.' A thruster is something that thrusts; the term became common in space exploration.
Modern space missions use 'reaction control thrusters'—tiny rocket jets that shoot gas out to spin or move the spacecraft, showing that Newton's third law is literally how we steer in space.
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