Other major galaxy types are globular clusters , elliptical galaxies , and barred spirals , which have bars of dust , gas , and stars running across the galaxy s center like the spokes of a wheel 其它主要星系类型是球状群省略星系,和被禁止的螺旋,有尘土气体,和星酒吧运行横跨星系的中心象轮子的轮幅。
Such a figure caused controversy . the stellar evolution theory states that the oldest globular cluster might have existed for 15 billion years . how could a star be older than the universe 当时曾掀起一场争论，因为从恒星演化理论得知，一些最老的球状星团可能已有150亿年的寿命，怎可能星体比宇宙更年老？
Caption : : located in the constellation herculues , m13 is the largest and brightest globular cluster in the northern sky , third in the whole sky , after the omega centaurus and 47 tucanae 位于武仙座的球状星团m13 ，是北天球最大最亮的球状星团，在全天排行第三，仅次于南天球的半人马座奥米加星团，杜鹃座47 。
If the neutron star is in a globular cluster , it will perform an erratic dance around the center of the cluster , picking up a companion star which it may later swap for another 如果这个中子星处于球状星团中，它就会围绕星团中心作不规则的“舞蹈”运动，俘获一个“舞伴” （伴星） ，而且将来还可能更换它的伴侣。
If such galaxies formed by the merger of spirals , they should contain old globular clusters ( those originally associated with the spirals ) as well as younger ones ( created during the merger ) 如果这个椭圆星系是由螺旋星系融合而成，那麽原本属于螺旋星系的年老球状星团，以及在融合过程中所创生的年轻球状星团，都应同时包含在内。
Another intriguing feature of quasisoft x - ray sources is that they locate at different type of galaxies like spirals and ellipticals . quasisoft x - ray sources are also found in the halos of galaxies and even in globular clusters 类软天体另一有趣之处，是它们不单盘踞在旋涡或椭圆等不同类型星系内，在银晕甚至球状星团中竟亦见其踪影。
Meanwhile , data from hipparcos satellite shown that the globular cluster might be much further away from us . added to that , a review of theoretical model on globular cluster also prompted astronomers to believe that the globular cluster was not as old as previously estimated 同时从依巴谷卫星得出的资料显示，球状星团的距离可能更远一些，加上重新检视球状星团的理论模型，天文学家相信球状星团的年并不是最初估计的年老。
Apart from small black holes formed as a result of star evolution and supermassive black holes discovered at the centres of galaxies , astronomers found also middle scale black holes of size ranging from a few thousands to tens of thousands of solar masses in the centres of globular clusters 除了恒星演化而成的小黑洞，和星系核心的超级黑洞外，天文学家还发现了球状星团的中心存在著质量由几千至几万个太阳质量的中型黑洞。
Our model introduces the general equations of chemical evolution used in galaxies to studies of gcs . in this model the important gas outflow caused by the supernova explosion and other processes during the formation of globular clusters is included . based on such a self - enrichment model , monte carlo method is used to simulate the formation and chemical evolution of globular cluster systems , from which a new explanation of the bimodal metallicity distribution can be given 本文把星系演化中通用的化学演化方程引入到球状星团这一系统中来，特别考虑到球状星团中恒星形成过程中超新星爆发等因素引发的气体外流，把这一重要的物理过程包含到化学演化方程中，并用蒙特卡罗方法来模拟球状星团系统的自增丰演化。
The number density distribution of globular cluster in space will change with time due to the dynamic evolution , especially for those in the central region of the galaxy ; 5 . for the power law initial cluster mass function , the peak value of the mass function after the dynamic evolution is sensitive to the lower limit of the initial mass function we adopt . the suggested value in this paper is - 104m , which is consistent with that reduced from the dynamical analyses for the giant molecular clouds 对于幂率的初始质量谱，球状星团系统动力学演化后质量分布的转折点质量主要是由初始质量函数的质量下限决定的，最为适合的值为10 ~ 4m _ ；幂率的初始质量谱的谱指数对球状星团系统动力学演化后质量分布的转折点质量也有影响，其最佳值为1 . 5 2 . 0 ；经过大约5gyr的动力学演化，幂率的初始质量谱就会演化成为高斯的对数质量分布并具有在随后的动力学演化中保持对数高斯形式质量分布的特性。
