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200亿缩小比例下，体验距离太阳最近的“比邻星”究竟有多近！
半人马座a星是一颗三合星，也就是科幻小说中三体人的母星系，其中距离太阳最近的恒星就是半人马座阿尔法c星，俗称比邻星，它是一颗黄矮星，距离太阳4.2光年。这究竟是怎样的一段距离呢？
中学物理创新实验25/56
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