So justice is far from us, and righteousness does not reach us. We look for light, but all is darkness; for brightness, but we walk in deep shadows.
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So, as we look further and further away, it takes longer and longer for the light to get from where it's emitted to here and we can actually see backwards in time.
因此，当我们观测的距离越远，光线传播到那里花费的时间也越长。因此我们能够看到时光倒流。
Actually, that's what we do in available-light photography: look for the interesting light, then figure out how to use it to make an interesting picture.
事实上光线不好的时候拍摄照片就是要这样做——寻找有趣的光线然后思索如何利用光线拍摄出一幅有趣的照片。
The best approach is to look for transits, in which an orbiting planet passes in front of its star, dimming the amount of light we detect on Earth.
最好的捷径是寻找宇宙中一天体运行到另一天体与观察者之间，使前者如同经过后者的表面，使我们从地球上观察到的光线变暗。
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