The discoveries, described July 6 in the journal Astronomy & Astrophysics, more than double the number of known quasars from that primordial era and could help astronomers unravel one of cosmology's biggest mysteries: how supermassive black holes grew so enormous so quickly after the Big Bang.
Quasars are among the brightest objects in the universe. They form when gas and dust spiral into a galaxy's central supermassive black hole, heating up and releasing enormous amounts of energy that can outshine the galaxy itself. Each of the two most ancient quasars detected in the new study shone with the light of a trillion suns, according to the researchers.
"These early quasars date back to the Universe's infancy," Daming Yang, an astronomer at Leiden University in the Netherlands and first author of the new study, said in the statement. "By finding and studying them, we can better understand how these enormous systems formed and grew so quickly — one of the greatest mysteries in astrophysics."
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Euclid has also taken some time to study the nearby universe, revealing more than 60 million individual stars packed into the Milky Way's center in a sparkling image released in late June.
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