There are also telescopes that are used to look at light our eyes can't see, and with the invention of film, and later electronic detectors, we have been able to probe the Universe to amazing depths.

还有一些望远镜是用来观察我们肉眼看不到的光的，另外随着胶片以及后来的电子探测器的发明，我们对宇宙的探测已经可以达到惊人的深度了。