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.
YY4480电影院为您提供影片《宇宙苍穹》高清无删减版手机免费在线观看,也是一个最新在线观看，高清热门的视频网站，每天都更新大量的热门影视，来满足各位网友的需求！Copyright © YY4480电影院 All Rights Reserved
