The light the Universe emitted at the time would've been like a star, in the visible part of the electromagnetic spectrum, but the light that reaches us billions of years later — now — should be redshifted into microwave wavelengths.

在电磁波谱的可见部分，宇宙当时发出的光就像一颗恒星，但数十亿年后到达我们这里的光——现在——应该被红移为微波波长。