So quasars are spewing out charged particles.

所以类体出带电粒子。

They compared the brightness of those quasars to some that exist today.

他们将些类体的亮度与如今存在的一些类体进较。

We detect quasars with radio telescopes and radio antenna.

我们用射电望远镜和无线电天线探测到类体。

How can quasars produce radio waves and why can't I listen to them?

类体如何产生无线电波，为什么我不能听它们？

Researchers found that galaxies hosting quasars are around three times as likely to be interacting or colliding with others.

研究人员发现，拥有类体的系与其他系互动或碰撞的可能性大约是其他系的三倍。

Happily, the name was shortened to quasar, which, you'll admit, is way cooler.

幸运的是，个名字被缩短为类体，不得不说，个名字要酷得多。

Such jets are indeed observed in a number of galaxies and quasars.

在许多系和类体中确实观察到流。

Typical  quasars consume one to a hundred Earth masses of gas per minute!

典型的类体每分钟消耗一到一百个地球质量的气体！

Scientists in the UK say quasars, the brightest and most powerful objects in the universe, may be the result of galaxies merging.

英国科学家表示，宇宙中最亮、最强大的天体类体可能是系合并的结果。

12. quasars, which fountain energy at rates the universe has never seen since their heyday.

类体，其能量以宇宙自鼎盛时期以来从未见过的速度射。

And quasars are the perfect backlight. Their luminosity can be thousands of times that of whole galaxies.

类体是完美的背光源。它们的亮度可以是整个系的数千倍。

One theory is that this is caused by a quasar ionization echo.

一理论认为是由类体电离回波引起的。

This is what a quasar is, a super  massive black hole having a feast.

就是类体，一个正在举办盛宴的超大质量黑洞。

Quasars are much brighter, so scientists are able to observe the activity from much further away and deeper in the past.

类体要明亮得多，所以科学家们能够从更远更深的地方观察到过去的活动。

The brightest quasars power jets, tangling the  magnetic field of the matter around them into a narrow cone.

最亮的类体为流提供动力，将其周围物质的磁场缠结成一个狭窄的圆锥体。

13. quasars are now thought to be black holes devouring material in the crowded centers of their host galaxies.

类体现在被认为是吞噬宿主系拥挤中心的物质的黑洞。

But quasars can't eat for long,   maybe a few million years, because their feast ultimately kills their galaxy.

但类体不能吃太久，也许几百万年，因为它们的盛宴最终会杀死它们的系。

How Quasars Kill Galaxies Okay, maybe " killing" is a bit of an exaggeration.

类体如何杀死系 好吧，也许“杀死”个词有点夸张。

A galaxy is still there after its quasar turns off.

类体关闭后，系仍然存在。

On top of that, quasars push gas out of  their galaxies.

最重要的是，类体将气体推出系。