1)open cluster疏散星团
1.The mass segregation effects of open clusters,including spatial mass segregation and velocity mass segregation,are of great importance for studies of formation and evolution of clusters.对疏散星团质量分层的有关问题做了简要的评述,包括空间质量分层和速度质量分层的表现形式和探测途径,质量分层形成机制的研究现状。
2.Using the stellar proper motions reduced from the observational data of photographic plates taken with the 40 cm double astrograph of Shanghai Astronomical Observatory, the distribution parameters and membership probabilities of stars in the region of the open cluster NGC6530 are determined on the basis of the maximum likelihood principle and given in tabular form.利用上海天文台40厘米折射望远镜照相观测资料所得出的恒星自行,按最大似然原理确定了疏散星团NGC6530天区内恒星的成员概率。
3.4magin the region of the open cluster NGC6530 are reduced by a central overlapping techniqu.本文选用由中科院上海天文台佘山工作站的40厘米双筒折射望远镜所拍摄的两期6 张照相底片,对疏散星团NGC6530 中心周围60 ′×60′范围天区内364颗恒星进行了研究。
英文短句/例句
1.Photometric Studies of QX And in the Intermediate-age Open Cluster NGC 752中等年龄疏散星团NGC752中的QX And变星的测光研究
2.Maximum Likelihood Estimation of the Kinematic Properties of Open Cluster System;疏散星团系统运动学参数的最大似然估值
3.Inside the nebula lies an open cluster of bright young stars designated NGC2244.于星云中躺著一群由明亮年轻恒星组成的疏散星团，名为NGC2244。
4.An open star cluster in the constellation Taurus, consisting of several hundred stars, of which six are visible to the naked eye.昴星团金牛星座中的疏散星团，由几百颗恒星组成，其中六颗星用肉眼可看到
5.Stars condense from the matter scattered thinly through interstellar space.恒星是疏散在星际空间的物质凝聚而成的。
6.A Revision on Lithium Abundance Dispersin in Pleiades Stars重新审查昴星团成员星锂丰度的弥散
7.Galactic nebulas are masses of diffuse material within our galaxy.银河星云是我们星系中的一团团弥散物。
8.pressurized evacuation route正压疏散路线疏散路线蔓延
9.A person evacuated from a dangerous area.被疏散者从危险地区被疏散出的人员
10.Announcer: All personnel evacuate! Repeat! All personnel evacuate!!广播：所有人员疏散！重复！所有人员疏散！
11.Another402,200 people have been evacuated from affected areas, said Liu Hui, deputy head of the disaster relief office under the provincial civil affairs department at a press conference on Sunday afternoon.另有402,200群众从灾区疏散，省民政厅救灾处副处长刘辉在星期天下午的新闻发布会上说。
12.travel distance to exit至太平门的疏散距离
13.EVACNET = Evacuation Network Computer Model疏散网络计算机模型
14.The clouds paled and pulled apart.云层变淡,渐渐疏散。
15.a thinly scattered population散布得很稀疏的居民
16.She will be all right after a couple of doses of medicine to relieve the congestion."不过偶感风寒,吃一两剂药疏散疏散就好了."
17.To bring about the redistribution of(an urban population and industry)to suburban areas.人口疏散把（城市人口和工业）疏散分布至郊区
18.a star cluster in the constellation Taurus.金牛星座中的一个星团。
相关短句/例句
open clusters疏散星团
1.The significance in studying the stellar evolution and observing the open clusters and clouds near the Gould s belt is expressed.简述已有几个天体测量标准天区的大小、星数以及恒星位置和自行的精度;给出LAMOST天体测量标准天区选择的原则;介绍研究疏散星团和古德带附近星团观测的意义;列出13个LAMOST 天体测量标准天区J2000。
2.more reasonable method of membership determination for open clusters is applied to the typical old Galactic cluster M67 in the present paper.本文利用合理的成员判定方法对典型年老疏散星团Ｍ６７进行了成员判定，直接得到了该团存在空间和速度空间质量分层效应的结论。
3)shusan xingxituan疏散星系团
4)young open cluster年轻疏散星团
5)open cluster system疏散星团系统
1.Some studies about open cluster system,such as spatial distribution and kinematic properties,are presented.本文以疏散星团系统为研究样本，分析了疏散星团系统的空间分布与运动学性质。
6)open cluster-star-variable star疏散星团-恒星-变星
延伸阅读
疏散星团疏散星团opencluster星团的一类。又称银河星团。疏散星团的外形不规则，成员星数比球状星团少得多，只有几十个到上千个。疏散星团的大小为几秒差距，质量为几十到千倍太阳质量。疏散星团属星族Ⅰ天体，它们分布在银道面附近。根据疏散星团的赫罗图和现代恒星演化理论，可以确定疏散星团的年龄。结果表明，疏散星团的年龄相差很大，有的年轻，有的年老。已发现1000多个疏散星团，其中最著名的如昴星团、毕星团、鬼星团等。
