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A Be-type star with a black-hole companion
![A Be-type star with a black-hole companion A Be-type star with a black-hole companion](/insights/sites/default/files/styles/low_resolution/public/EA%20Be-type%20star%20with%20a%20black-hole%20companion.jpg?itok=a9Tha-Dt)
Scientists have discovered the first binary system ever known to consist of a black hole and a Be star. The scientists, who conducted a detailed analysis of the star’s spectrum, found that the star was accompanied by an object with a mass between 3.8 and 6.9 solar masses, and concluded that it was a black hole. Read more in Nature.