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A team of researchers led by University of Texas at Austin astronomer Ivan Ramirez has identified the first "sibling" of the Sun -- a star that was almost certainly born from the same cloud of gas and dust as our star. Ramirez' methods will help other astronomers find other "solar siblings," work that could lead to an understanding of how and where our Sun formed, and how our solar system became hospitable for life. The work will be published in the June 1 issue of The Astrophysical Journal.
Additionally, there is a chance, "small, but not zero," Ramirez said, that these solar sibling stars could host planets that harbor life. In their earliest days within their birth cluster, he explains, collisions could have knocked chunks off of planets, and these fragments could have travelled between solar systems, and perhaps even may have been responsible for bringing primitive life to Earth. Or, fragments from Earth could have transported life to planets orbiting solar siblings. "So it could be argued that solar siblings are key candidates in the search for extraterrestrial life," Ramirez said.
The solar sibling his team identified is a star called HD 162826, a star 15 percent more massive than the Sun, located 110 light-years away in the constellation Hercules. The star is not visible to the unaided eye, but easily can be seen with low-power binoculars, not far from the bright star Vega.
originally posted by: JadeStar
Even more exciting is that there are about 30 candidate stars which may be our Sun's siblings. The techniques used to verify this one can possibly be applied to some if not all of them.