Scientists Provide a Theory on How the Universe Became Filled with Light
August 30, 2017
After observing a nearby galaxy from which ultraviolet light is escaping, astronomers hypothesize that black holes may have punctured darkened galaxies and allowed light to escape.
Soon after the Big Bang, the universe went completely dark. The intense, seminal event that created the cosmos churned up so much hot, thick gas that light was completely trapped. Much later—perhaps as many as one billion years after the Big Bang—the universe expanded; became more transparent; and eventually filled up with galaxies, planets, stars, and other objects that give off visible light. That’s the universe we know today.
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