Hyperdrive (Earth-2356)

The hyperdrive is a propulsion system that allows a starship to reach lightspeed and traverse the void between stars in the alternate dimension of hyperspace. As a consequence, the hyperdrive was a key instrument in shaping galactic society, trade, politics and war.

The hyperdrive functions by sending hypermatter particles to hurl a ship into hyperspace while preserving the vessel's mass/energy profile, and require a functional hyperdrive motivator to do so. The vessel then travel along a programmed course until it drops back into normal space—realspace—at its destination.

A hyperdrive only function to keep a vessel in hyperspace, and should a hyperdrive be forcibly deactivated or destroyed during transit, the ship is violently pulled back into realspace.

Source

 * https://starwars.fandom.com/wiki/Hyperdrive.