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The observable universe is 93 billion light years across. But just how big is that?
可观测宇宙的直径为930亿光年。但到底是多大呢？
Well, it's roughly 100 quintillion times the size of the Earth.
大概就是地球的10的20次方倍大小。
For comparison, imagine taking this whole 1920 pixel by 1080 pixel video and making just one pixel white and the rest black.
为了作比较，就把它想象成一个1920×1080像素的视频，然后把一个像素变成白色，剩下的全变成黑色。
If you were to take each row of one thousand, nine hundred and twenty pixels and string them all end to end,
如果你取每个有1920个像素的横行并把它们头尾相接成一条线，
then shrink that huge distance down to the size of one pixel of the video,
然后将这个巨大的距离缩小到视频的一个像素大小，
string the new video's pixels out end to end, shrink it all down AGAIN to the size of one pixel of video,
将新视频的像素首尾相连，并再次把它缩小到一个视频像素大小，
and string the pixels out end to end once more... that one tiny white pixel represents the earth,
并再次把这些像素首尾相连，这一个小白像素点就代表地球，
and the string of all the pixels all together, is one tenth of the diameter of the observable universe.
然后将这条线上的所有像素加在一起，这就是可观测宇宙直径的十分之一。
