Saturday , December 4 2021

An ancient star could be one of the oldest in the universe



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Astronomers now believe that the star called 2MASS J18082002-5104378 B can be 13.5 billion years old. This is almost as old as our estimates for the universe itself.

Known as the Old Star, 2MASS J18082002-5104378 B can be one of the oldest stars of the universe. The key to the age is its extremely low metal content, which suggests it was made from materials created by a big bang.

The old star has only 10 percent of the metal content on Earth.

Methuselah is another star that is metal poor and pretty old
Methuselah is another star that is metal poor and pretty old

Early stars would mostly be made of hydrogen, helium and some lithium. As these stars burn out, they explode and send into the universe the metals created in their nuclei. These materials would be the basis of newer stars and planets.

While our own sun is 100,000 generations removed from the big bang. It is possible that 2MASS J18082002-5104378 B could be one generation from a big bang.

The old star is surprising because she is surprisingly close to Earth in the Milky Way.

If he says about his rarity, said Kevin Schlaufman, an author from Johns Hopkins University, "this star is probably one of ten million." "He explains something important about the first generation of stars," he continued.

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Such an old star helps answer even more questions, especially the age of the universe. The premature star was considered massive and had a relatively short lifetime – perhaps up to 20 million years.

The discovery suggested that our galactic neighborhood could be 3 billion years older than previously thought.

As such, it is hard to find evidence that supports the age of the universe, since most of the first stars are long gone and have moved to various challenges, such as black holes or neutron stars.

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