Artist's impression of a quasar in a primeval galaxy about 900 million years after the Big Bang. In three quasars, Hubble spotted substantial amounts of iron, which must have been forged in the first stars of the universe.
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Artist's impression of a quasar in a primeval galaxy about 900 million years after the Big Bang. In three quasars, Hubble spotted substantial amounts of iron, which must have been forged in the first stars of the universe. |
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