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Open clusters, also called galactic clusters, contain fewer and younger stars than globular clusters. 开放星团，也称为星系团，比球状星团的恒星还要少且年轻。
Comparing with the open cluster, their stars are older. 和疏散星团相比,星一般较老。
Most of the V is formed by an open cluster of stars, called the Hyades. 这个V字型大致是由一串星星组成的，它们叫毕星云。
Figure 1 A good example of an openness cluster. 图1这是表示开诚布公的形体动作群的很好示范。
Some statistical analyses concerning spatial distribution as well as kinematical properties of Galactic open clusters are also made briefly. 对银河系疏散星团的空间分布(采用了更多样本)和运动学性质进行了若干统计分析。
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。
An open cluster consists of about a few hundred stars, the stars are mainly younger stars. 疏散星团包含数百颗成员星,星一般较浅。
The Pleiades nebulosity is caused by a chance encounter between an open cluster of stars and a molecular cloud. 昴星团是在一次偶然的机会下，由一个疏散星团与一个分子星云遭遇而形成的。
This could abruptly leave an open cluster with too little mass to gravitationally hold together for very long. 在很长时间里，疏散星团里的物质因个体质量过小而无法靠重力作用聚集在一起。
We today know the Pleiades as an open cluster of stars: born together and still loosely bound by gravity. 我们今天知道昴星团作为一个疏散星团，（它们）出生在一起且很少受重力的影响。
X-ray satellites have shown that the gas in galactic clusters is indeed enriched in these elements. X射线卫星已证明：星系团气体确实富含重元素。
The above pictured open cluster, M25, contains thousands of stars and is about two thousand light years distant. 上面影像中的疏散星团M25，包含数千颗恒星，距离我们大约2,000光年。
All three findings pointed to dynamic movement in galaxiesin monstrous galactic clusters, the largest stable structures in the universe. 的三项发现都指出，在宇宙最大的稳定结构，即星系和巨大银河星团中有动态的运动。
Like gems in a jewel box, though, the stars of open cluster NGC 290 glitter in a beautiful display of brightness and color. 但类似珠宝盒里的珍宝，疏散星团NGC 290内的恒星，美丽地闪烁著各种不同的光芒和颜色。
In addition to housing a bright open cluster of stars known as the Trapezium, the Orion Nebula contains many stellar nurseries. 除了有一个明亮疏散星团--四合星外，猎户座星云还具有许多恒星孕育场。
The invisible force is thought to be a large-scale "anti-gravity," pushing apart galactic clusters and causing the unexplainable, accelerating expansion of the universe. 科学家认为暗能量这种无形的力是一种大规模的“反引力”，它使星系团相互排斥，导致了宇宙令人费解的加速膨胀。
Over the ensuing eons, matter organized itself into bodies of increasingly large size: subgalactic scraps, majestic galaxies, galactic clusters, great walls of galaxies. 在随后的亿万年里，物质一点一滴地形成，并不断地增大其结构：从次星系尺度的块垒，扩增至浩瀚的星系、系团，甚而星系长城。
We also describe the basic principle of white dwarf cosmochronology and its application in defining the age of the Galactic disk, globular clusters, open clusters and Galactic halo. 介绍了白矮星宇宙纪年学研究的基本原理及其在银盘、球状星团、疏散星团以及银晕年龄确定方面的应用现状。
Over the years, a number of organizations and companies have supported the Open Cluster Group, including Dell, IBM, Intel, NCSA, and ORNL, to mention only a few. 公司的起点非常非常好，可别进行太大的改革。”他完全理解投资者的担心，他们不想这家创造力十足的公司变得僵化死板。
A group of astronomers surveyed sun-like stars in the Orion nebula open cluster and found that fewer than 10 percent have enough surrounding dust to make Jupiter-sized planets. 一组科学家调查了猎户星座星云里类似太阳的恒星，发现低于10%25星球能够有足够的环绕尘埃形成木星规模的行星。