Spacecraft could fly to distant stars using sails with surfaces similar to those of CDs and DVDs to help them stay centered on laser beams, a new study finds. One concern with using laser sails is that if they drift out of alignment with the propelling laser beams — which will be based here on Earth, at least initially, in Breakthrough Starshot's plan — they may veer wildly off course from their targets. Now scientists have designed and tested a new sail that could in principle automatically keep itself centered on a laser beam for the required few minutes, allowing a spacecraft to stay on course for interplanetary or even interstellar journeys. Read full article at: https://www.space.com/laser-sail-centering-breakthrough-starshot.html