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Sun's twin discovered — The perfect SETI target?

from Discovery News

Astronomers have identified a clone to our sun lying only 200 light-years away, a yellow dwarf that is exactly the same mass, temperature and chemical composition as our nearest star. In a recent paper reporting on observations of the star — called HP 56948 — astronomer Jorge Melendez of the University of San Paulo, Brazil, calls it "the best solar twin known to date." the chemical composition of HP 56548 has unusual amounts of aluminum, calcium, magnesium, and silicon -- by the same ratio as our sun has. This means terrestrial planets could exist around HP 56548. Simply put, the nearby presence of a twin star potentially offers a fascinating experiment in parallel evolution. more


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