A team of Canadian astronomers used the James Webb Telescope (JWST) to locate the most distant globular clusters ever discovered. Globular clusters are dense clusters of millions of stars that may represent the remnants of the earliest and oldest stars in the universe.
According to the study, the galaxy’s ancient star collections were formed when the galaxy was still young, and they have knowledge of the early stages of the galaxy’s expansion and evolution.
Which leads to the question: What is the oldest star in the universe? And how old is he?
Read on to unravel the tiny mysterious thread surrounding our universe.
Our universe is vast beyond imagination and mysterious. We have only explored about 5% of the seemingly endless universe.
There are hundreds of billions of stars in our known universe, each with its own distinct characteristics. Some are so large that they are larger than entire galaxies, some are very small, and some are not even visible. And some older life.
The oldest star in the known universe is the star Methuselah, also known as HD 140283, a stellar subdiv.
Source: Star Events
Methuselah is located in the constellation Libra, near the Ophiuchus border of the Milky Way galaxy and about 190 light-years from Earth. It has an apparent magnitude of 7,205.
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How old is the oldest star in the universe?
Methuselah is believed to be the oldest star in the entire known universe, having formed more than 14 billion years ago. Its age makes it older than the universe itself.
Another mystery is added to the list of mysteries related to our universe.
Subdiv is definitely old. It has very little iron and consists mainly of hydrogen and helium. This composition indicates that the star must have formed when helium and hydrogen dominated the universe and before iron became common, because heavier elements only evolved when massive stars formed. them in their core.
According to a study published in the Astrophysical Journal, the estimated age of a star depends not only on the amount of energy it produced at the time, but also on how it produced energy throughout its lifetime. its existence.
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Methuselah’s metallicity was carefully measured, and the star’s age was determined to be 14.46 billion years, with an error of 800 million years in either direction. This star may be 13.6 billion years old, about the same age as the universe, despite the obvious contradiction with the generally accepted cosmic age, which is estimated at 13.77 billion years. It could also be significantly older than the universe, 15.3 billion years old.
Methuselah is still the oldest star in the universe, so it makes no difference (on this question) whether it is older than the universe or not.
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Source: vcmp.edu.vn