Shortly after the universe was formed, long stars were formed. Some are still in the galaxy today.
The sun has come from thousands of consecutive generations of stars that have been created and extinct since the great blood.
However, at a distance of about 2000 light years from the sun, astronomers have discovered a star that shares only one generation from the beginning of cosmos.
Body 2MASS J18082002-5104378 B originates 13.5 billion years ago. It is about 300 million years after great cod.
The research document was published by the scientific journal Astrophysical Journal.
First, the universe only formed three elements. Hydrogen, helium and helium. Everything was created by nuclear synthesis, that is, by connecting atomic nuclei to the stars.
Metals, for example, originate in the largest stars. Or during starbursts – supernovae.
Metal content (metallicity) increased gradually. The younger stars were made of cloudberry clouds scattered by earlier generation explosions.
Thanks to this we can rank the stars in some rhododendrons. Spectroscopic analysis of their light reveals what high metal content they contain. The smaller the older generation's squad is.
About thirty stars contain extremely few metals. Astronomers from John Hopkins University have now discovered a new recorder.
It carries the "subtle" character of 2MASS J18082002-5104378 B. One contains 10,000 kinds of less metals than the sun.
"Only one of maybe ten million known stars is such," says senior author Kevin Schlaufman. "This star tells us something very important about the first generation of stars."
Thirty days ago, the old stars have reached the weight of the sun. The new recorder is seven times less concrete.
Truth is out there
Until recently only very concrete stars had emerged shortly after the great cod.
This would mean that the first generation of stars has ceased without exception. Extremely long stars spend their "fuel" very fast. Instead of billions, only hundreds of thousands live.
(For comparison, the red dwarfs live 2-12 times less massive than the sun, tens of billions to billions of years.)
However, more advanced computer simulations suggested that, in some circumstances, even small stars could be created in the early universe. At the same time they were so long that they could go on to this day.
"It turns out that star stars also originate from a small amount of material, which means that these relics can still occur soon after large cod," said research co-author Andrew Casey
"Our Sun is the descendant of thousands of generations of short-lived, massive stars," said Schlaufman. "But this star probably had only an ancestor who pleased her from the beginning."
According to the astronomer, the new discovery suggests that we will once again discover stars from the very first generation.
Even the home of the sun is older
The newly discovered star differs in many ways from other stars with extremely low metallicity.
The center of the galaxy is centered around a circular orbit. Like the sun. And they have never gone too far from the galactic planet – the planet where most of the Milky Way disc material is found.
On the other hand, other stars with extremely low metallicity circulate on the elliptical path and often extend far from galactic plane.
2MASS J18082002-5104378 B, does not "bump" our galaxy, but it is a solid part of the galaxy's so-called thin disc.
This indicates that the thin plate, including the sun, is older. It was three billion years earlier than previously thought.