@Quantium40 'Impulse'' power in Star Trek was (and still is) a real concept of aerospace propulsion that's quite workable, and we've had primitive versions of it for decades. It's not even slightly that fast. It's just a sophisticated form of mass-loss thrust, like a rocket. In fact, it's really just a ginned-up rocket. You use it when you need to go much SLOWER than light.

Highly advanced impulse could in theory accelerate to very high speeds, but it might take some time.