Inside most galaxies a supermassive black hole lurks.

在大多数的银河系中都会隐藏着一个。

But what about supermassive black holes?

但如果是超大质呢？

And I study supermassive, hyperactive, black holes called " blazars" .

我研究的是特大质、极度活跃的，叫做“耀变体”。

It's believed the center is a supermassive black hole.

人们相信银河系中心有一个巨大的。

Most galaxies are built around supermassive black holes.

大多数星系都是围绕超大质建造的。

At the center of the galaxy is a supermassive black hole.

该星系的中心是一个特大质的。

Supermassive black holes are far bigger, millions or billions of kilometers across.

超大质要大得多，直径达数百万或数十亿公里。

So make sure to choose a supermassive one.

所以一定要选择一个特大质的恒星。

Seeing the whole area near a supermassive black hole can be helpful to scientists.

观测超大质附近的整个区域对科学会有帮助。

It was a supermassive black hole 4 million times the mass of our sun.

这是一个质是太阳质400万倍的超大质。

Neutron stars are the extremely dense remnants of supermassive stars that have exploded as supernovae.

中子星是极其密集的超大质星体爆炸后残留下来的物体，这些星体曾经是超新星。

Quiescent galaxies have supermassive black holes in their center, where many collisions take place.

静止星系的中心有超大质的，在那里发生了许多碰撞。

Even supermassive black holes in galactic centers evaporate.

即使是星系中心的超大质也会蒸发。

There are also supermassive black holes.

还有超大质的。

We now think that these supermassive black holes form at the same time galaxies do.

我们现在认为这些超大质是与星系同时形成的。

And finally there are the supermassive black holes that are at the center of most galaxies.

最后是位于大多数星系中心的超大质。

It is far smaller than the supermassive black holes found at the center of large galaxies.

其远远小于在大型星系中心发现的超大质。

Each of these low-dark matter dwarves orbited a supermassive galaxy, the way a moon might orbit a planet.

这些缺少暗物质的矮星系，每个都围绕一个超大质星系运行，就像卫星围绕行星运转一样。

Galaxies contain billions of stars and planets, and some may even have supermassive black holes at their center.

星系包含着数以亿计的恒星和行星某些星系，甚至在其中心还含有大质。

Other sources should exist, however, chief among them mergers of supermassive black holes weighing millions to billions of suns.

然而应该存在别的来源，其中最主要的是超大质的合并，而这些有数百万至数十亿颗太阳那么重。