A laser beam-riding sail in the shape of a giant trapped ping pong ball could carry the first manmade object across interstellar space towards the recently-discovered Earth-like exoplanet Proxima b, according to Harvard University researchers. The main idea behind the Breakthrough Starshot Initiative is to send light-propelled nanocrafts to the Alpha Centauri system within the next generation. Image credit: Breakthrough Initiatives. A sail that harnesses...
