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- 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。
- 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。
- 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。
- 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。
- 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。
- Plant having basal grasslike leaves and a narrow open cluster of starlike yellowish-orange flowers atop a leafless stalk,southwestern United States,only species of Anthericum growing in North America. 具有基生草状叶，在无叶的茎干顶部长着窄的、张开的、星形、淡桔黄色的花，生长于美国西南部，在北美生长的一个安寿属的品种。
- 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。
- Also unlike globular clusters, open clusters are generally confined to the plane of our Galaxy. 不同于球状星团，开放星团一般仅限于我们的银河的平面内。
- The Hyades and Pleiades are the two brightest and most noticeable open clusters in the night sky. 毕星团与昴星团是夜空中两个最亮最显而易见的疏散星团。
- The partially embedded cluster NGC 2244, as one of the youngest open clusters with an evolutionary age of about 2Myrs, is located in the center of Rosette Nebula. NGC 2244 是个年龄只有2Myr 左右的非常年轻的疏散星团,位于玫瑰星云的中心空洞处,是个部分嵌埋星团。
- NGC 290 and other open clusters are good laboratories for studying how stars of different masses evolve, since all the open cluster's stars were born at about the same time. NGC 290及其它疏散星团，是研究不同质量的恒星如何演化的好实验室，因为疏散星团的恒星大约都是在同一时间诞生的。
- Pea pods burst open when overripe. 豌豆过熟就会爆裂。
