23 August 2010

Solar System older than previously thought : Nature News

Solar System older than previously thought : Nature News:
"A meteorite found in the Sahara Desert has helped to pin down the age of the Solar System and shed light on how it may have formed.

The new estimate, which comes from measuring the ratios of lead isotopes inside the chondrite — an ancient stony meteorite — suggests that the Solar System is 4.568 billion years old. This is 0.3–1.9 million years older than some previous studies projected. The relatively small revision means that models of the gas and dust that gave rise to the Solar System should have around double the amount of a certain iron isotope, iron-60, than previously suggested."

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