Globular cluster

Star Formation for Globular Cluster System

球状星团中的恒星形成

A typical globular cluster has about 1 million stars .

一个典型的球状星团包含1百万恒星。

Absolute proper motion of globular cluster NGC 4147 on Hipparcos system

球状星团NGC4147基于Hipparcos系统的绝对自行

Globular cluster containing massive black hole

中心含大质量黑洞的星团

The proper and space motions of globular cluster NGC 4147 on Hipparcos system

球状星团NGC4147基于依巴谷系统的自行和空间运动

Is the great globular cluster in hercules .

巨大的星云是武仙座。

The effect of absolute proper motion determinations of the globular cluster m3 on calculations of its orbit

球状星团M3绝对自行的测定对其轨道计算结果的影响

Accretion Effects in A Globular Cluster

球状星团中的吸积效应

Globular cluster is a group of tens of thousands to millions of stars bounded under gravity .

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。

Absolute proper motions and colour-magnitude diagrams of the globular cluster NGC 4147

球状星团NGC4147的绝对自行和颜色星等图

HVGC-1 stands for hypervelocity globular cluster 1 .

HUGC-1指的是“超高速球状星团1号”。

The metal1icity distributions imply three probab1e epochs of globular cluster formation corresponding to three kinds of formation models .

球状星团金属度的分布表明球状星团可能有三个形成时期，分别与三类形成模型对应；

The evolution time in our calculation is chosen to be 12 Gyr , which is the mean value of globular cluster ages in the Galaxy .

动力学演化的时间取为银河系球状星团的平均年龄12Gyr。

We did use a few double stars and an open and globular cluster for comparison , but mostly we used one crater so that it would be very easy to spot differences .

我们也用一些分解双星和球状星团来进行测试，但是大多数条件下我们都用月坑，因为月坑可以非常容易的看出不同来。

We could have hundreds of stars , like a globular cluster , and they could collide with each other , they could explode , they could break apart all those forces are internal , they don 't count .

我们有几百颗星星，如球状的星云，它们相互碰撞，它们可能爆炸分离，都是内力，可以不计。

NANCY GRACE ROMAN : " I think the image that to me was most was the center of a globular cluster . You could see each star , and see their color , and it was just a sight . "

NancyGraceRoman：“我认为对我来说最震撼的就是中心的球状聚集物。你可以清楚的看到每一颗星，看到它们的颜色，真的是非常壮观的景象。”

At first , this age-dating approach was used to estimate the age of G-dwarf stars with Th / Nd chronometry . Recently , it has been used to evaluate the age of halo field stars and globular cluster stars with the Th / Eu and U / Th chronometers .

这种方法最初是利用元素对Th/Nd来确定G矮星的年龄，近年来开始利用元素对Th/Eu和U/Th来确定晕族场星和球状星团内恒星的年龄。