Researchers unlock the keys to designing an interstellar sail

How do you design a sail that can get a spacecraft to another solar system? 

NASA’s Voyager 1 and Voyager 2 probes, which launched in the 1970s, remain the only two human-made objects ever to leave our solar system. While the pair have defied expectations and are still operational, researchers continue to devise new missions that could explore beyond our stellar neighborhood. One technology known as a light sail, a sail pushed by light instead of wind, seems to be a promising way to accomplish such an ambitious goal.