1. Even the nearest star system, Proxima Centauri 比, lies more than four light-years away, so it appears to us on Earth as it was just over four years ago when the light began its journey.
即使最近的恒星系统——比邻星，也位于四光年开外的地方，所以对于地球上的我们来说，比邻星是四年前其光线开始传播时的样子。
2. Scientists speculate it is possible that a cool star lurks right under our noses, closer to us than our nearest known star, Proxima Centauri, which is four light-years away.
科学家推测，比比邻星离我们更近的冷恒星的存在是有可能的。比邻星距离我们是4个光年。