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.更多《再见亦是老婆》中字免费在线播放、再见亦是老婆在线高清观看免费、再见亦是老婆免费完整版在线观看相关欧美综艺资源，请持续关注迪博民药影视!