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it wasn't in the visible spectrum. Stopping. And then re-inertation happened just after the first stars, the galaxy formed. And this is UV. It played a role in this UV for the first stars, the black holes, the ripple electrons from neutral hydrogen, and the cause was, it was, it was, it was, it was, it was plasma. Now we're going back to where light is now being trapped, but it wasn't dense enough. So it wasn't dense enough to trap light. So the ionization used light to travel through it to escape. And much of the UV from the first stars and black holes was absorbed by the neutral hydrogen gas. So the rest of the light visible light was able to come through at that point from the beginning of the first stars. That gives you an idea of the timeline of the universe and what the dark ages have meant as far as the evolution of the universe.