请勿相信视频中的任何广告 正在播放:宇宙苍穹第03集在线观看
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宇宙苍穹第03集在线观看

《宇宙苍穹》剧情・介绍

<p>  In trying to comprehend our universe, just how big is big? How far is far? This users guide to the cosmos will bring the incomprehensible down to a human scale such as Venus melting a tank, the density of a black hole compared to 1000 cars in a Coke can, and the comets in the Solar System equated to grains of sugar weighing half a ton.</p>

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