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23 & # 39; November 2018 – 18:38
It is so similar to the Sun that scientists say it is not only her sister, but her twin. An international team & # 39; astronomisti discovered a star that looks like the star king. They asked HD186302 and is 184 light years & # 39; away.
It is so similar to the Sun that scientists say it is not only her sister, but her twin. An international team & # 39; astronomisti discovered a star that looks like the star king.
It has the same temperature and brightness, very similar chemical composition and almost the same age, about 4500 million years.
The twinned star, called HD 186 302, is 184 light-years and will allow the scientists to investigate the birthplace of the Sun, remaining & # 39; mystery.
"As m & # 39; there is too much information about Solar past, the study & # 39; these sister stars can & # 39; help us understand where in the galaxy and the conditions under which the Sun formed, "said Vardan Adibekyan, an astronomer at the astrophysics Institute and Sciences. a & # 39; the Space Portugal, who led the investigation.
Cribs of & # 39; Star
The astronomisti were looking Solar sisters for a long time, that is, stars that formed in the same cloud of gas and dust like ours. S & # 39; now, few candidates for solar nuns were identified.
F & # 39; this group & # 39; & # 39 stars can; there are many Solar Sisters, but it was very difficult to find.
It is known that thousands of & # 39; & # 39 formed in stars, those cradles or stellar nurseries, but with the passage of time are scattered in the Milk Way so it's very difficult to find them.
Adibekyan and his colleagues used a sophisticated method in their research.
"With the collaboration of & # 39; Patrick de Laverny and Alejandra Recio Blanco, of the European Coastal Observatory, obtained a sample of & # 39; 230,000 project spectrum Ambre (initiative created by the European Southern Observatory and the Costa Azul Observatory) ".
Scientists have also used that data in spectral & # 39; very large sample & # 39; star obtained European satellite Gaia.
"Earth 2.0"
One of the big questions that astronomisti will seek to answer is whether a planet around HD 186 302 can embrace life.
"Some theoretical calculations show that a non-negligible probability that life could have extended from Earth to other planets or exoplanetary systems during the period & # 39, the last powerful bombing", Adibekyan said. The bombing was intense period & # 39; about 4000 million years ago when the Solar System bodies were hit by a large asteroids.
The possibility of finding signs of life in & # 39; exoplanet solar twin enthuse Adibekyan.
"If we are lucky and our solar mother has planet and the planet is rocky, located in the habitable zone, and finally, if that planet was contaminated by life seeds in the World, then we have x & # 39; can & # 39; have a dream: Earth 2.0, 2.0 orbiting Sun ".
Source: BBC World News
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