Well, what does that mean? Well, look out even further than we've just been -- I mean from here, with a telescope -- and you'll see things that look like stars, they're called quasars. "Quasars" originally meant "quasi-stellar object," which means "things that look a bit like stars."  And we know what they are. Billions of years ago and billions of light-years away, the material at the center of a galaxy collapsed
这又意味着什么呢？向我们刚去过的地方的更远处望去-- 我的意思是从这里开始，利用望远镜 -- 你会看到类似恒星的东西。 他们叫做类星体。类星体原意是指类似恒星的物体。 也就是说是指看上去有点像恒星的物体。（观众笑声）但是他们不是恒星。 我们已经知道他们是什么了。数十亿年前，数十亿光年之外， 一个星系中心的物质朝着