West of Australia's Great Dividing Range, a cluster of giant black gashes marks one of the country's biggest coal mines.

澳大利亚大分水岭的西面，有很多巨大的黑色深沟，这里是该国最大的煤炭产地。

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And just like the volcano here on Earth, shockwaves can be seen when the black hole pumps energetic particles into the cluster gas.

并且就像地球上的火山喷发，当黑洞向星团气体注入高能粒子时，我们可以看到冲击波。

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Evidence from NASA's Chandra X-ray Observatory and the Magellan telescopes suggest a star was torn apart by an intermediate-mass black hole in a globular cluster.

来自美国宇航局的钱德拉X射线天文台和麦哲伦望远镜证据表明恒星被一个球状星团的中等大小黑洞撕裂。

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The top-right cluster of black buttons lets you change focus between clips, devices, tracks and so on.

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Dozens of houses with black-tiled roofs cluster around the port.

CNN: WHERE IT'S GOOD TO BE OLD

Now, astronomers have scoured one of the few suspected hiding spots for medium-sized black holes in a globular cluster, and conclude they are rare or nonexistent.

MSN: Existence of middleweight black holes nearly ruled out