In trying to comprehend our universe, just how big is big? How far is far? This users guide最新实时总票房排名 to the cosmos will bring the incomprehensible down to a human sc梁静茹歌曲ale 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 writeas憋着尿按压肚子weighing half a ton.