恒星

The authors present a targets detection method based on the hierarchical clustering which constructs the similarity measuring function according the movement rule of stars and targets,finds the optimal separating hyperplane and classified amount by means of finding the inflexion of error square sum function,then distinguish the targets from stars and noises by two level hierarchical clustering.

提出了基于层次聚类的空间弱小目标检测算法，以星点到参考恒星之间的距离变化为依据，根据恒星和目标的运动特性构造相似性度量函数，通过寻找误差平方和曲线拐点的方法寻找最优分类曲面和分类个数，最后以两层复合分类将恒星、噪声和目标分离。

Moffat of the Universite de Montreal. So finding them is hard. That's why very few have been known and measured.

" "一颗恒星内含的物质是太阳的100倍还多，这种情况是很少见的，"蒙特利尔大学的研究人员安东尼· F · J ·莫法特指出，"所以发现这样的恒星也很难，也正是由于这个原因，已经了解和测量过的恒星寥寥无几。

At the edge of a large molecular cloud in Monoceros, some 5,000 light years away, the petals of this rose are actually a stellar nursery whose lovely, symmetric shape is sculpted by the winds and radiation from its central cluster of hot young stars.

星云位于麒麟座巨大分子云的边缘，距离我们大约5，000光年远，而玫瑰的花瓣实际上就是一个恒星孕育场，而其可爱而对称的形状是由于中央年轻炽热恒星团发出的恒星风和放射线侵蚀而成。

At the same time, according to the connection of the star's number, the constellation display list would be created.

采用OpenGL的辅助库画立体球体，把恒星的球面坐标转化为三维直角坐标，用恒星的点坐标建立显示列表，再根据恒星互相连接编号进行连线并建立星座显示列表。

Usually only the brightest, bluest, most massive stars in a star forming region are visible, but the above image was taken in such high resolution and in such specific colors that many recently formed stars that are more yellow, more dim, and less massive are also discernable.

通常情况下只有那些最蓝的，质量最大的恒星才在恒星形成区中可见，但是以上的照片有着如此之高的空间分辨率和颜色精度，以至于许多不久前形成的比较偏黄色的比较暗淡的并且质量比较小的恒星也被辨识出来。

Near the center of the ring is aWolf-Rayet star, a massive, hot, short-lived star that generates an intense stellar wind.

靠近这道环的中心有颗沃夫-瑞叶型恒星，这是种会发出强烈恒星风的炽热短命恒星。

We've been observing a sunlike star called 55 Cancri, star 55 in the constellation Cancer, for 19 years, and we watch the wobble of this star as it's yanked on by the planets orbiting it.

&我们19年来一直观察一颗类似于太阳的恒星，叫做&巨蟹55，是巨蟹座中的55号恒星，我们也注意到当这颗恒星被围绕它运行的行星拖拽过去的时候会摇摆。

Abundances of Li versus chromospheric activity indices 17, RHK, for the solar analogue stars with and without detected planets are shown in Fig.

在图表2a中，对于&类太阳&恒星中的&有行星&恒星以及&无行星&恒星，用Rhk来表示锂丰度相对色球层活动指数（参考文献17）。

Based on the data, the team extrapolates that at least 3.5% of all sunlike stars across the Milky Way currently harbor rocky planets.

基于上述数据，研究小组推断，在整个银河系所有的类日恒星中，至少有3.5%的恒星目前拥有岩石恒星。

We have been observing a sunlike star called 55, star 55 in the Cancer, for 19 years, and we watch the of this star as it's by the planets orbiting it.

19年来，我们一直在观察名叫'巨蟹55'的类太阳恒星，即巨蟹座中的55号恒星。我们还观察到这颗恒星在被围绕它运行的行星强行吸引过去的时候会不太稳定。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了