The first stars, born just a few hundred million years after the Big Bang, were composed almost entirely of hydrogen and helium, the only elements that existed immediately after the Big Bang. These stars shone brightly, lived briefly, and died in explosions that released the first heavier elements into the atmosphere.
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The first stars, born just a few hundred million years after the Big Bang, were composed almost entirely of hydrogen and helium, the only elements that existed immediately after the Big Bang. These stars shone brightly, lived briefly, and died in explosions that released the first heavier elements into the atmosphere.