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外星人看地球竟是这样：瞬间好绝望
source link: http://tech.sina.com.cn/d/2017-10-19/doc-ifymyyxw3675132.shtml
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我们都渴望看到外星人，但如果真的有外星人，说不定他们也在寻找我们，只是宇宙实在太大了，光速实在太慢了，我们看到的宇宙，其实都是N年前的样子。甚至是距离我们最近的恒星太阳，呈现给我们的也是8分钟之前的模样，因为光从太阳跑到地球，就需要8分钟。
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