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Astronomers may have Discovered Sun's Identical Twin

Researchers believe they have finally found a star identical to our sun. The newfound object, dubbed HD186302, is a G3-type…

Researchers believe they have finally found a star identical to our sun. The newfound object, dubbed HD186302, is a G3-type main sequence star that is similar to our sun in terms of both age and chemical composition. Videre, det er ikke bare en solskib, men også en solar twin.

Stars generally are not born alone. De formater indenfor massive stjerneklynger og lige binære stjernesystemer, hvilket betyder at næsten alle nyfødte stjerner har en companion. Men forklarer hvorfor nogle stjerner er loners, mens andre har to eller tre kompanioner, har været noget af en mystik.

Astronomer har længe søkt for en companion til vores sol så godt. De tror at tusenvis af stjerner blev dannet i samme massive kluster som solen omkring 4,6 milliard år siden.

The idea that all stars form with a companion have important implications, not only for stars’ activity, but also for the formation of those stars within galaxies.

“Since there is not much information about the sun’s passes, studying these stars can help us understand where in the Galaxy and under which conditions the sun was formed.” Vardan Adibekyan Institute of Astrophysics and Ciências Do Espaço (IA) said in a statement.

In the latest effort, researchers used a novel method to detect solar siblings. De tok en prøve på 230 000 spektra fra AMBRE-projektet, som er et galaktisk arkæologiprojekt, som sätts upp av European Space Observatory. Derefter kombinerte de denne meget høje kvalitet spektrale data med nyere astrometriske data hentet fra European Space Agency’s GAIA-mission og lavet et udvalg af stjerner med kemiske sammensætninger, alder og kinematiske egenskaber svarende til sol.

Ved sammenligning af resultaterne fra AMBRE-projekt med GAIA data, researchers have made the discovery of a single solar sibling. Solar siblings are ideal candidates for searching beyond our solar system.

Vardan Adibekyan says. “Sommige theoretische berekeningen tonen aan dat er sprake is van een niet-verwaarloosbare waarschijnlijkheid dat het leven verspreid van aarde naar andere planeten of verklarende systemen, tijdens de periode van de late heavy bombardment. If we are lucky, and our sibling candidate has a planet, and the planet is a rocky type, in the habitable zone, and finally if this planet was contaminated by the life seeds from Earth, then we have what one could dream &#821

1; an Earth 2.0, orbiting a sun 2.0. “

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