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天文随心听|讲述宇宙与人的故事

光年是一种长度单位,那么1光年有多远?

05 Aug 2019

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首先你需要了解光年是个长度单位而不是什么所谓的时间单位,1光年也就是光一年内传播的距离,光的速度在真空中每秒大约30万千米,1年约等于3000万秒,由此可以算出1光年约等于9万亿千米。

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