这道喷流是受到隐匿在活跃星系半人马座a附近的超大黑洞所驱使，这黑洞约莫数百万个太阳的质量。
The jets are expelled by a violent black hole millions of times the mass of our Sun embedded deep in the center of nearby active galaxy cen a.
但是，多数的星系在中央还有超大的黑洞，它们的重量为数百万个太阳，将具有延伸数百万英里的边界。
But most galaxies also have supermassive black holes at their centers, which weigh millions of SUNS and would have boundaries that stretch millions of miles.
猫掌星云看起来就像一个巨大的爪印，它是恒星形成区域，近几百万年间在猫掌星云里诞生的恒星具有近10个太阳的质量。
Resembling a huge paw print, the Cat's paw Nebula is a star-formation region, with stars of close to 10 solar masses produced there in the past several million years.
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