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阿波罗20号任务揭秘：15亿年前的外星飞船与神秘遗骸当时，NASA为阿波罗20号选定了一个极具科学价值的着陆点——科普尔尼库斯环形山。这个直径约93公里、深度达3.8公里的巨大撞击坑，形成于大约35亿 ...
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