原因在于所谓的暗物质，这种隐藏的物质占了宇宙质量的80%以上。
The reason is so-called dark matter, the hidden stuffthat makes up more than 80 per cent of the mass of the universe.
我们的研究结果表明占宇宙质量90%的物质不能发出可从地球上观测到的光。
Our findings suggest that as much as 90 percent of the mass of the universe is not radiating at any wavelength with enough intensity to be detected on the Earth.
除了吸收气体和星体，M87星系的这个宇宙质量冠军很有可能是一系列黑洞合并的结果，最近的一次可能发生在不太遥远的过去。
Aside from feasting on gas and stars, M87's champion is likely the result of aseries of black hole mergers, the last of which may have happened in the nottoo distant past.
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