Saturday , April 10 2021

The Ancient Star of the Big Bang that is at Milky Way: Study



The astronomer team has found that it could be one of the universe's oldest stars, almost entirely made up of materials from the Big Bang.

The star in the same part of the Milky Way galaxy as our own solar system is believed to be 13.5 billion years old, as evidenced by its extremely low metal content or metallicity, reports the Xinhua news agency.

According to co-author Andrew Casey, earlier it was believed that the first stars that emerged in the universe were still not able to exist today.

"The conclusions are significant, because for the first time we were able to provide direct evidence that very old, low mass stars exist and could survive to this day without destroying themselves," said Casey.

Star metallicity increases when they are born and die in a cycle that causes more and more heavy metals and the Earth's Sun is about 100,000 generations down this line and contains a metal content that is approximately equal to 14 Jupiters.

The universe created at the beginning of the universe, however, consisted only of elements such as hydrogen, helium and a small amount of lithium, which means that the newly discovered star has a very low degree of metallicity, which is approximately the same as the planet Mercury.

This suggests that it could be as little as one generation was removed from the universe, researchers noted.

By about 1990, scientists believed that only massive stars could have formed in the early stages of the universe, and they could never be observed because they quickly burned fuel and died.

However, the new study showed that stars of low mass can last as long as 13 billion years after the Big Bang – for example, red dwarf stars that are part of the mass of the sun, are believed to be living for billions of years.

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