Monday, September 10, 2012

Star close to Earth that resists ageing discovered

Scientists have claimed that a member of a nearby cluster of stars in the Milky Way may hold the secret to eternal youth.
This glob, scientifically known as a globular cluster was observed by the European Southern Observatory (ESO)’s La Silla Observatory in Chile.

The photo showed the glowing orb of tens of thousands of ancient stars, all thought to have formed in the universe’s distant past, reported.
However, one star showed surprising signs of youthfulness.
Astronomers can gauge the age of stars by the chemical elements revealed in their light.
Stars which formed long ago, when the universe was young, generally contain few heavy elements, because the universe hadn’t yet accumulated enough of these.
Some light elements, which were present when ancient stars formed, are depleted as stars age.
The strange star appears to have held on to its share of one such light element, lithium, according to recent observations.
“The source of this lithium is mysterious,” ESO scientists said.
“Normally this element is gradually destroyed over the billions of years of a star’s life, but this one star amongst thousands seems to have the secret of eternal youth. It has either somehow managed to retain its original lithium, or it has found a way to enrich itself with freshly made lithium,” they added.
The star is a member of the Messier 4 globular cluster, one of the closest clusters to Earth.
The cluster, also known as NGC 6121, lies in the constellation of Scorpius (The Scorpion), and is easily visible to stargazers through binoculars or a small telescope.

News: The Hindu

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