The Farthest Star Sheds New Light on the Early Universe

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The Farthest Star Sheds New Light on the Early Universe
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“We almost didn’t believe it at first, it was so much farther than the previous most distant star.” Via WIREDUK

About 12.9 billion years ago, at the dawn of the known universe, a star was born. It was 50 times bigger than our Sun and a million times brighter, and—like much of the early universe—was probably composed of mainly lighter elements, like hydrogen and helium.

Earendel’s discovery offers a glimpse into the first billion years after the Big Bang, when the universe was just 7 percent of its current age. At 12.9 billion light-years away, it smashes the previous record of 9 billion, which was also set by Hubble when it observed a giant blue star called Icarus in 2018.

That amplified Earendel’s light by a factor of thousands and allowed Hubble to see farther than ever before. “It’s an incredible distance. And what’s special about it is, because the light has taken 12.9 billion years to reach us, we’re seeing the universe practically as a baby,” says Becky Smethurst, an astrophysicist at the University of Oxford who was not involved in the research.

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