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Her age was determined by the metal content.
Astronomers at the Monash University in Australia discovered in the milky way, whose age reached a record 13.5 billion years. This object came about 300 million years after the Big Bang.
According to scientists, 2MASS J18082002-5104378 B can be one of the oldest stars in the Universe. Her age was determined by the concentration of metals in it is almost absent. Metals and other elements heavier than hydrogen were thrown into the interstellar medium, with the death of the stars, and with each new generation, the metallicity of the stars increased. According to estimates, the concentration of metals in the 2MASS J18082002-5104378 B is about 10 times lower than that of the Earth.
The presence of such stars in the Milky Way indicates that the Galaxy is older than 3-5 billion years than previously thought. In addition, its mass is only 10 percent of the mass of the sun, which is the lower limit for the combustion of hydrogen.
According to scientists, this means that the very first stars in the Universe probably were not supermassive, and were formed from small amounts of material. This small size allows for many tens of billions of years.
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