Mashable's Top 5 most realistic methods of interstellar travel

Science fiction is full of examples of starships that can zip across the cosmos at speeds that are highly convenient. Some writers have drawn on real science and principles to explain their physics-bending technology. Others just kind of made it up as they went along.

Here are some of the most popular kinds of fictional the faster-than-light (FTL) travel, and how they rate in reality, according to Mashable.