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STELLAR CHEMISTRY
Solar System older than thought
by Staff Writers
Paris (AFP) Aug 22, 2010


The Solar System could be nearly two million years older than thought, according to a study published on Sunday by the journal Nature Geoscience.

The evidence comes from a 1.49-kilo (3.2-pound) meteorite, found in the Moroccan desert in 2004, that contains a "relict" mineral, which is one of the oldest solid materials formed after the birth of the Sun.

Analysis of lead isotopes suggest the mineral was formed 4.45682 billion years ago, making the meteorite the oldest object ever found.

As a result, the Solar System is likely to be between 300,000 and 1.9 million years older than previous estimates, says the paper, authored by Audrey Bouvier and Meenakshi Wadhwa of Arizona State University's the Center for Meteorite Studies.

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STELLAR CHEMISTRY
Eclipsing Pulsar Promises Clues To Crushed Matter
Greenbelt MD (SPX) Aug 19, 2010
Astronomers using NASA's Rossi X-ray Timing Explorer (RXTE) have found the first fast X-ray pulsar to be eclipsed by its companion star. Further studies of this unique stellar system will shed light on some of the most compressed matter in the universe and test a key prediction of Einstein's relativity theory. The pulsar is a rapidly spinning neutron star - the crushed core of a massive st ... read more


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