Galactic Methuselah
Astronomers discover earliest archaeological star of our galaxy
02.11.2014, 08:31 clock | AFP
The arrow indicates the researchers according to information 13.6 billion years old star. (AFP / Space Telescope Science Institute)
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the oldest ever discovered star Australian scientists claims to have found: The resulting 13.6 billion years ago star come from the beginnings of the universe, the researchers wrote in the new issue of the scientific journal “Nature”
According to the scientists’ calculations, the star was only about 200 million years after the Big Bang.
So far, two celestial bodies with an age of about 13.2 billion years ago, the oldest known stars. In addition, the star now described is relatively close to Earth, as writes Stefan Keller from the observatory Mont Stromlo in the Australian capital Canberra.
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About 6000 light years from Earth
He is in our galaxy, the Milky Way, about 6,000 light-years away from Earth. On the star list, the newly discovered object has number SMSS J031300.36-670839.3.
The absence of any detectableiron in the light spectrum of the star that led to the proof of age, said Keller. “The iron content in the universe increases with time, as the generations of stars are forming and die,” Keller emphasized. The iron content could therefore be used as a “clock” for the age of a star.
Low iron content as evidence
In the case of the star now described the proportion of iron is, according to Keller only about one millionth of the proportion of our sun and is at least sixty times less than for any other star. “This means that our star is today the oldest ever discovered star.”
11.02.2014, 08:31 clock | AFP
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