Dormant 33 solar-masses black hole

We announce the serendipitous discovery of a nearby (590pc) binary system composed of an old very metal-poor giant star orbiting a black hole with an estimated mass of...我们宣布偶然发现了一个距离为590秒差距（parsec）的邻近双星系统，该系统由一颗老年贫金属巨星与一颗估算质量为……的黑洞构成，巨星环绕该黑洞运行。