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Electromagnetic propulsion is a new kind of technology which uses a magnet's natual ability to push another magnet away. When controlled, the magnet's push can be used to propel another magnetic object.

Maglev trains use this technology. Basically, the train and the rail both have magnets, but set up so they push each other away instead of sticking together. Using huge electrical coils, electrical charges move the train along.

We're hoping to use this technology to push spaceships forward in space.