A Be-type star with a black-hole companion
![A Be-type star with a black-hole companion](https://www.editage.com/insights/wp-content/uploads/2018/09/EA-Be-type-star-with-a-black-hole-companion.jpg)
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.