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This is Scientific American's 60-Second Space, I'm John Matson. Got a minute?

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There's an old-timer in the neighborhood, and it's got a story to tell.

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A new study of a relatively nearby old star shows that it's almost as old as the big bang itself.

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The star HD 140283 lies about 190 light-years away in the constellation Libra.

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Astronomers have long known that it's ancient, because it contains mostly hydrogen and helium

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which were present at the dawn of the universe, and few of the heavy elements that were forged later in stellar furnaces.

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With the Hubble Space Telescope, researchers have now pinned down the distance to HD 140283,

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which allowed them to determine how bright the star is.

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Along with the chemical composition of the star, the newly derived stellar properties allowed for a new age estimate.

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The study of HD 140283, in the Astrophysical Journal Letters, found that the star is 14.46 billion years old.

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But the entire universe, as you may have heard, is only 13.77 billion years old.

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The two age estimates aren't actually in conflict, because there's always some uncertainty.

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The full age estimate is thus 14.46 billion years plus or minus 800 million years.

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Put your money on the minus.

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Thanks for the minute, for Scientific American's 60-Second Space. I'm John Matson.

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