How do rockets change direction in space?
Quick Answer
They use small thrusters and reaction wheels, relying on conservation of momentum instead of air or road contact. In space, even a tiny push can gradually change a spacecraft’s orientation or path.
The Full Story
A spacecraft cannot steer like an airplane because there is no air to push against. Instead, it uses thrusters that fire in short bursts to rotate or nudge its trajectory, and many satellites also use reaction wheels that spin inside the craft to change orientation. This works because momentum must be conserved: when the spacecraft expels propellant one way, it moves the opposite way. Precision pointing is essential for telescopes, communications satellites, and interplanetary probes.
Key Facts
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Suggested video title for this topic:
"How a spacecraft turns with no wings, no wheels, and no air"
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