球状星团曾经统治着银河系。
球状星团中有很多宇宙中最古老的恒星。
Globular clusters have some of the oldest stars in the universe.
因此，研究球状星团可以向我们揭示银河系的历史。
Studyingglobular 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。
Studying globular clusters therefore tells us about the history of our galaxy.
不同的植物描绘出恒星、球状星团，甚至还有星云。
Different plants depict stars, globular clusters, and even nebulas.
球状星团47Tuc中也存在一些奇怪的紫外双星系统。
Globular cluster 47 Tuc is also home to exotic X-ray binary star systems.
也许在条件适当时，球状星团便会不断地形成。
频谱显示出氧和氮，但没有氢，一个球状星团内罕见的信号。
The spectrum reveals emission from oxygen and nitrogen but no hydrogen, a rare set of signals from within globular clusters.
上千球状星团围绕着银河，其中包含一些宇宙中最老的星星。
Surrounding the Milky Way are thousands of spherical globular star clusters containing some of the oldest stars in the Universe.
在星系和球状星团之间没有任何不可逾越的鸿沟。
There is no absolutely sharp cutoff distinguishing galaxies from globular clusters.
罗曼：“我觉得那张图片最让我印象深刻的是球状星团的中心。”
NANCY GRACE ROMAN: "I think the image that to me was most striking was the center of a globular cluster."
是不是有丰富种类的恒星，球状星团这样只包含类型体的要被排除；
whether it hosts a good variety of different types of star, which excludes globular clusters which contain only similar stars;
称作球状星团的小型恒星团体经常环绕在旋涡星系周围。
Smaller groups of stars called globular clusters often surround spiral galaxies.
球状星团的寿命超过十亿年，是宇宙中最古老的物质之一。
At more than ten billion years old, globular clusters are some of the oldest objects in the universe.
对许多球状星团进行研究之后，使我们得到一些重要信息。
A study of many globular clusters gives another important bit of information.
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 can be found spread largely in a vast halo around our galaxy.
当然，M13恰当地被称为武仙座球状星团，北天最明亮的球状星团之一。
Of course, M13 is now modestly recognized as the Great Globular Cluster in Hercules, one of the brightest globular star clusters in the northern sky.
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。
Globularclusters can be found spread largely in a vast halo around our galaxy.
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。
Recently astronomers have discovered these intermediateage globular clusters in several elliptical galaxies.
小麦哲伦云的左边，明亮的白色物体，是银河系内一个球状星团，被称作杜鹃47。
The bright white object just to the left of the SMC is a globular cluster of stars in the Milky Way known as 47 Tucana.
我们如何能确定这些类球状星团就是我们星系里球状星团当年的样子呢？
How could we be sure that these globular like clusters really were younger versions of the globulars in our own 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。
Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy.
天文学家长期怀疑球状星团中包含中等质量的黑洞，但至今一直没它们存在的确凿证据。
Astronomers have long suspected globular clusters contained intermediate-mass black holes, but there has been no conclusive evidence of their existence there to date.
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。
The old age typical of the globular clusters in our galaxy has had a profound impact on the study of globulars in general.
这个物体另一个有趣的一面是，它是在一个球状星团中，一个很古老很紧密星群中被发现。
Another interesting aspect to this object is that it is found within a globular cluster, a very old, very tight grouping of stars.
A66是位于球状星团m 4红巨星支最底部(近亚巨星支顶部)的一颗红星。
A66 is a red star located at the lowest end of the red giant branch (near the top of the sub-giant branch) of the globular cluster M4.
图2：人马座欧米茄球状星团的聚合恒星展现出最新的第三代广域照相机强大的拍摄能力。
2: Massed stars in the Omega Centauriglobular cluster showcase the abilities of the new Wide Field Camera 3.
球状星团由上万至百万的恒星组成，在一个细小范围内由万有引力维系的集团。
Their mutual gravity binds stars into galaxies, every one a complex swarm of moving stars.
这个球状星团直径约为150光年，由1000万颗星星密集组成，它的年龄远远大于太阳。
Some 150 light-years in diameter, the cluster is packed with about 10 million stars much older than the Sun.
这个球状星团直径约为150光年，由1000万颗星星密集组成，它的年龄远远大于太阳。
Some 150 light-years in diameter, the cluster is packed with about 10 million stars much older than the Sun.
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