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What percentage of the stars are binary systems?

April 26, 2017binary PERCENTAGE stars SYSTEMS

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What percentage of the stars are binary systems?

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Somebody once said that “2 out of every 3 stars are in a binary”. Seriously, the fraction is very high, but it’s difficult to be precise, because it’s difficult to prove that a certain star is definitely single. Of the stars nearest to the Sun, about half are known to be in multiple systems. Koji Mukai for Ask a High-Energy Astronomer QUESTION: Binary stars are popular in science fiction. Star Wars’ Tatooine, for example.