Scientists have found a star with such a small mass.
The researchers took the power of speech: in our galaxy they discovered something very ancient and mysterious.
Recently, researchers at Monash University in Australia saw themselves as an ancient star in the Milky Way. Its age is 13.5 billion years. Scientists have called the discovery of 2MASS J18082002-5104378 B.
As it turned out, it remained unnoticed because of the tiny size and bare space. To see the old star managed only thanks to its brightest neighbor greater. In addition, the researchers discovered their age through detailed spectral analysis.
The fact that the first generation of stars formed after the Big Bang consisted of light elements such as hydrogen, helium and lithium. Then they gradually increased the number of metals. Thus, the "metallicity" of the stars was a good indicator to determine their age.
According to scientists, the 2MASS J18082002-5104378 B refers to the second generation of stars. Make sure your mass is only 10% of the mass of the Sun, and the amount of metals in it is 10% of all metals on our planet.
Astrophysicist Andrew Casey admitted that for the first time he discovered a star with a tiny mass and small amounts of metals. There is also the assumption that in our galaxy there might be other ancient stars, but they would not be easy to detect because of their small size.
"These stars are extremely rare – the process of finding them like finding needles in the haystack. But because of the sheer amount of data collected by terrestrial and space telescopes, we are more than ever close to understanding how the stars formed at the beginning of the Universe, "said Casey.
This discovery offers the opportunity to learn more about the formation of stars in the Universe. As one of the oldest stars is located on the thin disk of the Milky Way, the question of the age of our galaxy has reopened. Perhaps she is much older than previously thought.