An artist's conception shows M33 X-7, a binary system in the galaxy M33 where a black hole is in orbit with a large star.

一副描绘M 33 X - 7的艺术概念图，这是位于M33星系的一个双星系统，黑洞正在一颗巨大恒星的轨道上运行。

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Binary star systems are common in the galaxy.

在星系中双星系统是很常见的。

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zel's team studied 16 binary systems in our galaxy known to contain a black hole and a stellar partner.

Özel的团队考察了银河系中的十六对双星系统，它们分别由一个黑洞和一颗恒星伴星组成。

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Our sun does not orbit another star, but roughly half of the stars in our Milky Way galaxy do, as part of a binary system.

MSN: 'Impossible' stars found in our galaxy - Technology & science - Space - Space.com | NBC News

Most stars in the galaxy are, in fact, in binary systems, and astronomers have been wondering whether the gravity of a second star nearby might disrupt a dust disc too much for planets to coalesce.

ECONOMIST: Dusty genesis

The discovery of exoplanets in binary and triple-star systems raises the prospect that the galaxy houses many more such objects than was previously thought.

ECONOMIST: Planetary science: When a world is born | The