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真的别小瞧这张图！它把人类已知的整个可观测宇宙都浓缩进去了——直径足足有930亿光年，所有星系和物质都包含在内！ 不过我突然想到个问题：在这片无边无际的宇宙之外，会不会还藏着另一个完全不同的世界呢？ 星际访客 2 months ago Play Download
