Scientists are exploring the possibility of using light to propel spaceships to other stars, with some suggesting that a trip to Alpha Centauri could take as little as 20 years. The concept, referred to as "metajets" or light propulsion, is being studied as a potential means of interstellar travel. The feasibility and implications of such a technology are being discussed, with some outlets considering the potential for it to expand humanity's reach in the solar system and beyond.