Astronomers know how the first quasars formed

Astronomers know how the first quasars formed

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

Short for “quasi-stellar radio sources”, quasars are gargantuan black holes which shine as brightly as galaxies and are millions to billions of times more massive than Earthit is the sun. Today, quasars exist at the center of many large galaxies. But thanks to their exceptional luminosity, quasars have been tracked very far space-timewith about 200 of them identified as forming within the first billion years of our universe’s history.

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