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Nearby Ancient Star is Almost as Old as the Universe
A new age estimate for the star HD 140283 is 14.46+-0.80 billion years, which implies that HD140283 was among the first few generations of stars created in the Universe (image credit: NASA, ESA, A. Felid (STScI)).
A metal-poor star located merely 190 light-years from the Sun is 14.46+-0.80 billion years old, which implies that the star is nearly as old as the Universe! Those results emerged from a new study led by Howard Bond. Such metal-poor stars are (super) important to astronomers because they set an independent lower limit for the age of the Universe, which can be used to corroborate age estimates inferred by other means.
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Read the rest of Nearby Ancient Star is Almost as Old as the Universe (839 words)
© Dan Majaess for Universe Today, 2013. |
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Post tags: Age of the universe, Astronomy, Cosmology, stellar evolution
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2013-02-23 11:03:46
Source: http://www.universetoday.com/100147/nearby-ancient-star-is-almost-as-old-as-the-universe/
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