How did the Universe begin? When the Big Bang occurred, for some time, there was nothing but very hot matter flying in all directions at the speed of light. Very shortly, though, the first star appeared. Its name was Methuselah, and for a long time, it confused astronomers who believed it might be older than the Universe itself. Soon after, on a cosmic scale, of course, the first black holes started forming. Scientists believe they’re what’s left of exploded stars, but that’s not for sure even today. At the same time, cosmic dust and matter began ionizing, helping to form...
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