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光年走一年多少路程
更新时间: 2020-11-06 00:00:00  

9460730472580800米。光年是长度单位,用来计量光在宇宙真空中沿直线传播一年时间的距离,该距离大约是9.46兆千米。光年一般用于天文学中,是用来量长度很长的距离,如太阳系跟另一恒星的距离。

关键词: 光年 多少 路程

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