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Colossal Ancient Galaxies Died From the Inside Out

Colossal Ancient Galaxies Died From the Inside Out

NBC News

The largest ancient galaxies stopped forming stars in their cores about 3 billion years after the Big Bang, with this end of star birth spreading from the inside out in so-called "dead" galaxies, scientists say. A new survey of 22 elliptical galaxies (most of which were the same size or larger than …

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