Studying globular clusters therefore tells us about the history of our galaxy.
因此，研究球状星团可以向我们揭示银河系的历史。
Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy.
回到过去，回到我们的星系刚形成时，可能有数千球状星团在银河系内游荡。
The spectrum reveals emission from oxygen and nitrogen but no hydrogen, a rare set of signals from within globular clusters.
频谱显示出氧和氮，但没有氢，一个球状星团内罕见的信号。
Astronomers know the system has been around for a while because the oldest stars in a few of its ancient globular clusters are about 10 billion years old.
由于其中最古老的球状星团中最古老的成员星年龄有100亿年，天文学家知道，这一系统已经相聚很久了。
The smallest looser 'open clusters' have only a few stellar members, whilst the largest tightly bound' globular clusters' have as many as several million stars.
最小的疏散星团里只有几个恒星，而最大的球状星团则由多达几百万颗恒星密集而成。
Smaller groups of stars called globular clusters often surround spiral galaxies.
称作球状星团的小型恒星团体经常环绕在旋涡星系周围。
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。
Recently astronomers have discovered these intermediateage globular clusters in several elliptical galaxies.
最近，天文学家已在数个椭圆星系里发现了这类中龄的球状星团。
The discovery of young and intermediate-age globular clusters opens up a whole new way to study how globulars form.
年轻及中年球状 星团的发现，为球状 星团的形成开启了新的研究道路。
The old age typical of the globular clusters in our galaxy has had a profound impact on the study of globulars in general.
在我们星系中，这些典型的老年球状星团对于一般球状星团的研究影响深远。
It also shows that all globular clusters in our Galaxy are very old, much older than the oldest open clusters in the Galactic disk.
球状星团与疏散星团年龄相比要老得多，表明它们是在银河系形成初期形成的恒星系统。
Astronomers have scanned the complete sky with various telescopes and detected pulsars in the Milky Way and nearby globular clusters.
天文学家们已经用多种望远镜扫描了整个天空，探测到了银河系内和球状星团附近的脉冲星。
These are globular clusters - groups of a million or so stars crammed into a volume that elsewhere would accommodate barely a single star.
这些球状星团是由上百万颗星体聚集在一处，而同样大小的空间，在其他地方却只能容纳一颗恒星。
However, they could arise in globular clusters, where massive objects quickly settle to the center like heavier molecules at the base of Earth's atmosphere.
因为在球状星团中大质量的天体很快就会进入星团的核心区域，就橡较重的分子总是位于地球大气层的底部一样。
We also describe the basic principle of White Dwarf cosmochronology and its application in defining the age of the Galactic disk, globular clusters, open clusters and Galactic halo.
介绍了白矮星宇宙纪年学研究的基本原理及其在银盘、球状星团、疏散星团以及银晕年龄确定方面的应用现状。
But even this misses out various characteristics that astronomers think are important, such as dominating the local environment, in the way the Milky way dominates the globular clusters nearby.
但是即使是这个定义，也缺失了许多天文学家认为非常重要的特性，比如支配当地的环境，银河系就是这样支配周围的球状星团的。
Globular clusters once ruled the Milky Way.
球状星团曾经统治着银河系。
Globular clusters have some of the oldest stars in the universe.
球状星团中有很多宇宙中最古老的恒星。
Globular clusters can be found spread largely in a vast halo around our galaxy.
我们可以观测到，球状星团在银河系周围的巨大光晕中广泛分布。
Globular clusters are nearly spherical groups of hundreds of thousands of stars bound by gravity. The stars in these clusters are among the oldest in the galaxy.
球状星团是近乎球形恒星群，由成千上万颗恒星构成，这些恒星通过引力作用被束缚在一起。这些星团中的恒星属于星系中最古老的恒星之列。
Globular clusters are nearly spherical groups of hundreds of thousands of stars bound by gravity. The stars in these clusters are among the oldest in the galaxy.
球状星团是近乎球形恒星群，由成千上万颗恒星构成，这些恒星通过引力作用被束缚在一起。这些星团中的恒星属于星系中最古老的恒星之列。
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