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Lorentz force turning
An innovative technique proposed for steering interstellar spacecraft (see interstellar probes and interstellar propulsion). It would involve unreeling several extremely long space tethers and giving them a high electric charge. The Lorentz force (a force experienced by a charge moving in a magnetic field) between with these tethers and the galactic magnetic field would result in the spacecraft undergoing a slow, constant course change which, over time, would be enough to switch the trajectory from one star to another.
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