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Dust from the dying star found in Antarctica may offer a clue to how life began on Earth


The history of the universe crashed into a star. Now scientists have analyzed the grain of long-dead stars in the hope of deciphering their secrets. ( Hans Braxmeier | Pixabay )

A tiny speck of Stardust were deposited in the heart of a meteorite found in Antarctica may solve the mystery of the origin of life on Earth.

Stardust from the early Universe

Identified by researchers from Arizona State University, is scanty grain, is believed to have been hurled by the explosion of a dying star.

Most stellar grains not survive the cosmic chaos, which is involved in the creation of the solar system and interstellar travel, but in great feat, this particular one known as LAP-149 made its way to the part of the universe, the solar system where currently resides. Here starry grains swept meteor and eventually fell to Earth.

According to a new paper published in the journal nature Astronomy, LAP-149 & # 39 is the only known piece of graphite and silicate grains from NOVA, which is a type of star explosion.

This is a single grain of dust gives scientists a glimpse into the early time of the universe, before the sun was even born. His foreign origin could shed light on the formation of not only the planet, but also the entire solar system.

"As the actual dust from stars such presolar grains give us an idea of ​​the building blocks that formed our solar system," explained the lead author of the P & # 39; er Haenecour in a press release the University of Arizona. "They also give us a direct image of the star in terms of the time it was formed by the grain."

Novae binary star system consisting of a dying star known as a white dwarf and a second star. As he slowly dies, a white dwarf stealing material from his older companion. In the end, he gets enough stellar material for periodic bursts of energy that create new chemical elements and cast these elements into space.

After the Big Bang, there were only a few elements. Fresh material from these stellar explosions helped disperse the new elements and create rich, diverse space that exist today – in the number of life.

Window To The Stars

A team of researchers led by Haenecour analyzed the tiny grains up to its atomic level, revealing how alien he was in fact, been found to be highly enriched isotope of carbon, known as 13C.

While the carbon isotopic composition in all samples from any point in the solar system usually depends on the factor of 50, Haenecour showed that 13C. LAP-149 was found enriched more than 50,000 times. According to the team, this is another proof that carbon and oxygen-rich grain originating from the new stars plays a role in the building blocks of the solar system.

Tests also show that the LAP-149 & # 39 is the first known member of the graphite grains containing inclusion silicates enriched with oxygen.

"We now know that the carbonate and silicate dust particles may be formed in the same new star ejected, and they get transported through the chemically different dust clots in the ejecta, that was predicted by the models of new stars, but never found in the sample, "said Haenecour,

If scientists could date such stellar grains, they could create a picture of the early galactic neighborhoods and to trace the origin of the solar system.

This one, LAP-149, contains enough atoms for researchers to determine its age, but the team hopes that future discoveries will give similar samples that are larger.

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