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How big is 可观察到的宇宙?

880 yottameters!

View History Report
可观察到的宇宙

其半径大概是 460 亿光年. 你可能会想说应该只看得到 137 亿光年远, 因为光线只行进了 137 亿年, 但因为宇宙的膨胀, 以前只有 137 亿光年远的天体现在已经在 460 亿光年的远 处了, 所以我们看得到囉.

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