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22-Feb-2019 19:11

No Population III stars are believed to exist in the present era, as such large stars would live short fiery lives a few million years long before exploding as supernovae.

Any later generation of stars had to be built from the hot gases of these ancient detonations but could not form until the debris had cooled down enough.

The estimated age of 16 billion years had an uncertainty of two billion years from the inaccuracy of its measured distance alone, if any of the predicted details of the star’s interior processes were off this uncertainty could be larger still.

Astronomers revisited the matter of HD 140283’s age.

Knowing a star’s intrinsic brightness is essential for estimating its age, to know its intrinsic brightness you must know its distance from Earth.

Unfortunately the distance to HD 140283 was not known as precisely as astronomers would have liked.

HD 140283 fits this description perfectly having only 1/250 of the heavier element content of our Sun and other stars in our part of the Galaxy.This suggests HD 140283 is an elderly star but when astronomers used their tested techniques to calculate its age they got a shocking result.HD 140283 appeared to be 16 billion years old, more than two billion years older than the rest of the cosmos (measured to be 13.78 ± 0.037 billion years old)!Get noticed for who you are, not what you look like.

This is a Digitized Sky Survey image of HD 140283, the oldest star with a well-determined age in our galaxy.HD 140283 is starting to show its age, it is approaching the red giant phase of its existence.The Anglo-Australian Observatory (AAO) UK Schmidt telescope photographed the star in blue light.Currently about 190 light years from the Sun, it is endlessly circling the Galactic Core in an orbit, vast in size and duration, which carries it down through the plane of our galaxy to the halo of ancient stars that encircle the Milky Way.