Astronomers know how the first quasars formed - Livescience.com

Some supermassive quasars formed within the first billion years after the Big Bang. Now, scientists know why.

Twinkling like cosmic lighthouses on a shore 13 billion light-years from Earth, quasars are some of the oldest, brightest relics of the early universe that astronomers can detect today. Short for "q… [+3435 chars]

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