Many of the galaxies are ablaze with star birth.
许多星系随着恒星的诞生而点燃生命之火。

Galaxies throughout the universe are ablaze with star birth.
遍布宇宙各处的星系都闪耀着恒星诞生的光芒。

There is no absolutely sharp cutoff distinguishing galaxies from globular clusters.
在星系和球状星团之间没有任何不可逾越的鸿沟。

We are interested in elliptical galaxies acting as lenses, in particular, those with dispersion velocity measurement.
我们对椭圆星系透镜有兴趣, 尤其是有速度测量的。

Galaxies can be divided into two classes normal galaxy and active galaxy.
星系通常分为正常星系与活动星系两类。

This is because elliptical galaxies dont actively create new stars.
这是因为椭圆星系并不积极创造新的恒星。

External galaxies akin to our own are scattered throughout space as far as we can see.
银河系附近的星系在空间中飘散, 正如我们所见到的。

As they look back towards Earth, our planet gradually diminishes to become just one more speck amid a lacy network of galaxies in space.
当参观者回头遥望地球时，会发现我们居住的星球越来越小，最后在带有花边的太空星系网络中化为一个小斑点。

Conversely, the same processes can actually amplify star formation in large galaxies.
相反的，相同的过程在大型星系中却能增强恒星的形成。

An Analytic Model for Multiple Merging of Galaxies
星系多次并合的解析模型

that is, galaxies and stars and so forth.
就是星系和恒星之类的

Some are spiral galaxies like the Milky Way and Andromeda.
有些星系和我们的银河系及仙女座一样是漩涡星系

that it blows the clump apart and galaxies don't form.
把物质快吹散，星系就无法形成。

Without it, galaxies and clusters of galaxies should fly apart.
如果没有，星系及星系群应该会分崩离析。

It is a perpetual impulse that pushed galaxies apart from each other.
这是一股永恒的冲量 使各星系之间的距离越来越大

The universe seems to be rapidly expanding its component galaxies moving ever farther apart.
宇宙似乎在膨胀, 它的组成部分星系互相离得越来越远。

The spiral shapes of two of these galaxies appear mostly intact.
这些星系中两个螺旋形状得看起来比较完整。

The biggest difference between galaxies is the huge variation in their appearance.
星系之间的最大不同就是其外观上的巨大差异。

There are approximately a hundred billion galaxies in the observable universe.
而在整个可见宇宙中 约有一千亿个星系

Do we see arcs in the sky when we look at, say, a cluster of galaxies?
当我们看一个星系团的时候，我们能看到弧形吗？

the assemblage of all galaxies the entire physical universe
总星系所有星系的总称整个自然宇宙

Studying the properties of stars and galaxies far away confirms this assumption.
遥远恒星和星系的研究结果仍然支持这个假设。

Modern astronomers have discovered over 100 million such galaxies.
现代天文学家发现了1亿多个这样得星系。

Astronomers have seen gargantuan plumes of material from nearer galaxies as well.
天文学家也看到过较近的星系伸出的巨大的羽状物。

Astronomically, it tells me that there are millions of galaxies and billions of planets.
从天文学上讲，有无数个星系和成千上万颗行星。