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Australian astronomers discover oldest star in Universe

Sydney, Feb 10 (EFE).- Australian astronomers have discovered the oldest known star in the Universe, a heavenly body formed shortly after the Big Bang some 13.6 billion years ago, media reports said Monday. The star, known as SMSS J031300.36-670839.3, is in the Milky Way galaxy and some 6,000 light years from the Earth. Scientists plan to use the star to study the chemical composition of the earliest heavenly bodies, opening the way for new approaches in examining the origins of the Universe.

Stellar brightness points to new class of stars

An intriguing stellar cluster located 7,000 light years from Earth has prompted astronomers to create a new class of stars with "pulsating" brightness, the European Southern Observatory (ESO) said on Wednesday. Sky-watchers made the discovery over seven years of patient measurements of 3,000 stars in a cluster called NGC 3766, found in the constellation of Centaurus. Unexpectedly, 36 of these stars had tiny variations in their normal brightness, they found. The luminosity varied by just 0.1 percent, with the changes occurring at periods ranging from two to 20 hours.
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