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‘Green Pea’ Galaxies May Hold Key to Understanding Early Universe

“Green pea” galaxies, which are small, round and green, may shed light on the formation of the early universe, according to a new study. Writing in the journal Nature, a research team says green pea galaxies, which were discovered in 2007, “were likely the reason that the universe heated up about 13 billion years ago.” Several hundred thousand years after the Big Bang, the universe was very hot and dense, which caused matter to become ionized. About 380,000 years later, the universe...

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