Thursday , December 3 2020

The unprecedented twentieth-century light twin discovery of El Salvador



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SDO NASA

Astronomers have long been looking for nurses from the Sun who were born in the same cloud of dust and gas as our star.

It is so similar to the Sun that scientists say it's not just her sister, but her twin.

An international team of astronomers discovered a star that resembles our copy.

It has the same temperature and brightness, chemical composition, very similar and almost the same, about 4,500 million years.

The star couple, called HD 186302 , is 184 light-years and will allow scientists to explore the birthplace of the sun, which remains a mystery.

"Because there is not much information about the past of the sun, studying these stars stars can help us understand where the galaxy is and in what conditions the sun is formed," he said in a statement. Vardan Adibekian , an astronomer at the Institute of Astrophysics and Space Sciences in Portugal, who led the study.

Star trimmings

Astronomers have long been looking for nurses from the sun, ie. stars they were formed in the same cloud of gas and dust on ours ,

So far, very few candidates for sun nurses have been identified.

Star Cluster Trumpler 14

ESO / H. Sana

In this bunch of stars there may be many nurses in the sun, but it is very difficult to find them.

It is known that thousands of stars have formed in these swings or stellar nurseries, but over time they have scattered in the Milky Way, so it is very difficult to find them.

Adibekian and his colleagues use sophisticated methods in their research.

"With the participation of Patrick de Laverny and Alejandra Rechi Blanco from the La Costa Azul Observatory, we received a sample of 230,000 spectra from the AMBRE project (an initiative created by the European Southern Observatory and the Costa Azul Observatory).

Scientists also used the spectral data in a very large sample of stars obtained thanks to the European Gaia satellite.

"Earth 2.0"

One of the big questions astronomers will try to answer is whether a planet around HD 186302 could sustain life.

"Some theoretical calculations show that there is an insignificant probability that life will be could expand from Earth to other planets or exoplanetary systems during the last intensive bombing, "Adibekian said.

Intense bombardment was about 4,000 million years ago when the solar system bodies were hit by large asteroids.

The possibility of discovering signs of life in the exoplanet of the solar couple enthusiastic enthusiasm.

"If we are lucky, and our solar nurse has a planet and the planet is rocky, it is in the habitable zone, and finally, if this planet has been contaminated with the seeds of life on Earth, then we have what it is possible to dream about: Earth 2.0 that circles around the Sun 2.0 ".


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