If you read or watch scifi at all, you're probably familiar with the term FTL, or faster than light travel, because it's the only way we will ever be able to explore more of our solar system - nevermind the universe. Well, okay, not the only way (wormholes come to mind), but the fact is because everything in space is so damn far away if we want to know more then we've got to invent FTL travel.
One method would be to employ an Alcubierre drive, which, unlike most methods of FTL travel actually conforms to the General Theory of Relativity rather than violates it. This method of travel was conceived by Miguel Alcubierre who imagined a bubble of normal space–time around a
spacecraft that would allow for FTL travel by expanding space itself
behind the ship and compressing it in front. Normal physics still
applies within the bubble, and so the passengers don’t feel any
acceleration at all. The bad news according to Popular Mechanics: