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"The Methuselah Dilemma" -- Atacama Cosmology Telescope Resolves True Age of Our Universe

In 2013, the Hubble Space Telescope found the birth certificate of oldest known star in the universe, cataloged as HD 140283, aptly named “methuselah”. The star, located in the constellation Libra, which is at the very first stages of expanding into a red giant, could be as old as 14.5 billion years (plus or minus 0.8 billion years), which at first glance would make it older than the universe’s calculated age of about 13.8 billion years, creating what we commonly call a dilemma.
The strange star, said NASA’s Hubble team, which has an anemic 1/250th as much of the heavy element content of our sun and other stars in our solar neighborhood.)has been known about for more than a century because of its fast motion across the sky. The high rate of motion is evidence that the star is simply a visitor to our stellar neighborhood. Its orbit carries it down through the plane of our galaxy from the ancient halo of stars that encircle the Milky Way, and will eventually sling ....

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A new look at the universe's oldest light | Space

January 12, 2021
New work agrees with older research suggesting the oldest light in the universe – from the most distant galaxy yet known – started its journey toward us 13.77 billion years ago.
View larger. | In 2013, the Planck space telescope released the most detailed map to date of the cosmic microwave background, the relic radiation from the Big Bang. It was the mission’s first all-sky picture of the oldest light in our universe, imprinted on the sky when it was just 380,000 years old. Now a new, independent study agrees with Planck’s results. That’s good news for astronomers trying to pin down the universe’s age and rate of expansion. Image via ESA. ....

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Ideas, Inventions And Innovations : New View of Nature's Oldest Light Suggest Universe Is 13.77 Billion Years Old

Ideas, Inventions And Innovations
New View of Nature’s Oldest Light Suggest Universe Is 13.77 Billion Years Old
From an observatory high above Chile’s Atacama Desert, astronomers have taken a new look at the oldest light in the universe.
Their observations, plus a bit of cosmic geometry, suggest that the universe is 13.77 billion years old – give or take 40 million years. A Cornell researcher co-authored one of two papers about the findings, which add a fresh twist to an ongoing debate in the astrophysics community.
The new estimate, using data gathered at the National Science Foundation’s Atacama Cosmology Telescope (ACT), matches the one provided by the standard model of the universe, as well as measurements of the same light made by the European Space Agency’s Planck satellite, which measured remnants of the Big Bang from 2009 to ’13. ....

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