Astronomers know how the first quasars formed

Twinkling like cosmic lighthouses on a shore 13 billion light-years from Earth, quasars are some of the oldest and brightest relics of the early universe that astronomers can detect today.

Short for “quasi-stellar radio sources,” quasars are massive black holes which shine as brightly as galaxies and are millions to billions of times more massive than The Earthit’s sun Today, quasars exist at the centers of many large galaxies. But thanks to their extraordinary brightness, quasars have been traced far away space timewith approximately 200 of these identified as having formed in the first billion years of our universe’s history.

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