They use an anti-electro-magnetic field, it disconnects their ship from the 1K MPH spin of earth and the 67K MPH movement of earth around the sun and the 510K MPH movement of the sun around the Milky Way.
So for a moment the ship is not part of the electro-magnetic field of both the earth and the sun and these objects move away from the ship at 67K MPH and 510K MPH for the sun..
Now it could be possible this anti-electromagnetic field even disconnects the ship from the 1.3 Million MPH movement of the Milky Way.
So by creating a bubble for the ship in which all electro-magnetic fields have no effect for even a short time allows the ship to move at super fast speeds with no energy output for it’s speed other than the energy it takes to create the temporary anti-electromagnetic bubble to ignore the normal effect the earth, sun and galaxy have on all things at all times.
The ship doesn’t move, everything else moves at their normal pace.
It appears that Nikola Tesla the great genius also imagined an AEM propulsion system before he died and simply called it a ‘space drive’ system.
