How is this possible?

Earth Engine operates on the same principle as the ‘Slingshot Effect’ space travel phenomenon, which enables a spacecraft to increase velocity via a gravitational assist.

In 2009, Dennis Danzik, an industrial engineer, scientist, and graduate of the MIT product development program, postulated that the same effect might be replicated on a smaller scale using magnets containing rare earth.

The problem Danzik faced was that a magnet’s ‘push’ is always equal to its ‘pull.’ But in the summer of 2012, Danzik succeeded in altering the ‘polarity’ of a magnet. He made one pole stronger than the other, inventing an Asymmetrical Magnet array, and the applied science of Magnetic Propulsion was born.