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.
图像既显示了老星，也显示了新星，还显示了一个星系的球状星团和我们自己星系尘埃的辐射。
The image shows both old stars and youngstars, a galactic globular cluster and emission from dust in our owngalaxy
另一方面，这些星云看上去并不像结构松散的球状矮星系一样紧紧地围绕银河系和其它主要的漩涡星系的轨道运行。
For another, the clouds don't look like the disheveled spheroidal dwarf galaxies that closely orbit the Milky Way and other major spirals.
研究人员们表示暗物质究竟包含什么对于他们的结果起着非常关键的作用，因为根据他们的理论，星系位于更大的球状结构——星系晕的包围之中，而星系晕是由不可见物质构成。
The researchers said the inclusion of dark matter is likely crucial to their results, because theory predicts that galaxies sit inside larger spheres, called halos, of the invisible stuff.
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.
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.
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.
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.
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.
人类观测到的大量的球状星团星系2808年提供了证据，表明它已经三代星级不是一个作为当前理论预测。
New Hubble observations of the massive globular cluster NGC 2808 provide evidence that it has three generations of stars instead of one as current theories predict.
有一种假说认为，这些球状星团是更早以前被NGC 1316吞并的星系所遗留下来的幸存者。
One hypothesis is that these globulars survive from an even earlier galaxy that was subsumed into NGC 1316.
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?
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。
It also shows that all globular clusters in our Galaxy are very old, much older than the oldest open clusters in the Galactic disk.
大部分椭圆星系所拥有的球状星团，不论是数量还是体型都超过NGC 1316。
Most elliptical galaxies have more and brighter globular clusters than NGC 1316.
本模型以银河系球状星团的形成和演化为出发点，但同样普适于其它星系中球状星团的形成和演化。
It is shown as well that this model is successful to apply not only to GCs in our Galaxy, but also to those in other galaxies as they have a universal formation process.
本模型以银河系球状星团的形成和演化为出发点，但同样普适于其它星系中球状星团的形成和演化。
It is shown as well that this model is successful to apply not only to GCs in our Galaxy, but also to those in other galaxies as they have a universal formation process.
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