恒星的

The total gravity force on the star from the stars enclosed by its circular orbit can be treated as if they are concentrated at the center.

对于一个离中心为 r 的恒星来讲，来自轨道内的恒星的引力与把它们集中在星系中心的一样，来自轨道外的恒星的引力合力为零。

The results show that the turbulent pressure can be 30 percent of the total pressure in the region closed to the surface of a AGB star with 7M〓 and has an important influence on the inner structure and evolution.

结果表明，对于7M〓恒星，在红巨星及AGB阶段，湍流压可以达到总压强的30％，并且对恒星的结构产生重要影响，对于2.8M〓恒星，在红巨星及AGB阶段影响较小。

Our abundance analysis, which followed standard prescriptions for stellar models, spectral synthesis code and stellar parameter determination12, confirm the peculiar behaviour of Li in the effective temperature range 5600–5900 K for the 30 planet-bearing stars with respect to the 103 stars without planets in the comparison sample.

通过对恒星模型、光谱合成辨认、以及恒星参数的确认（参考文献12）等大量分析后，在有效温度介于5600~~5900K的30颗"有行星"恒星与103颗"无行星"恒星的实验对照组中，我们可以确定锂元素的确表现出独特的性质。

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。

From the distribution of rotation period and convection parameter of M type stars, stellar chromospheric activity of M type stars depart from the anticipation of a.

对于A—早F型主序恒星的色球活动水平也随自转周期呈线性下降趋势，随Rossby数却呈上升趋势。A—早F型主序恒星的自转周期和恒星对流区的随色指数的分布明显地影响着这些恒星的色球活动行为。

For A-early F type MS stars, stellar chromospheric activity decrease with stellar rotation period, but increase with Rossby number; For M type MS stars, stellar chromospheric activity increase with stellar rotation period and Rossby number, and stellar chromospheric activity reach saturation at large color index; For the MS stars between mid-F to M type, stellar chromospheric activity decrease with stellar rotation period and Rossby number.

在第五章中，我们采用不同的磁活动指数研究了晚型恒星磁活动与恒星自转参量(自转周期、Rossby数)、磁活动与恒星色指数以及恒星磁活动指数之间的相关性。大样本分析显示晚型主序恒星的色球活动与恒星自转参量的研究晚型主序恒星的色球活动与恒星自转参量间的关系表现出对恒星光谱型的依赖。

Employed by consortia that operate global networks of telescopes (the Optical Gravitational Lensing Experiment and Microlensing Observations in Astrophysics), microlensing allows continuous monitoring for subtle brightening of far-distant stars as a relatively nearby star passes in front of them.

天文协会启动全球的望远镜网络，利用微引力透镜效应，可以连续监视诸多远距离恒星微妙的亮度增加情况。当一颗较近的恒星在遥远的恒星前面经过时，较远恒星的亮度就会有所增加。

These dust and gas clouds lie near the edge of a large molecular cloud. Themselves telltale signs of star-forming regions, they tend to hide the newly formed stars and young stellar objects or protostars from prying optical telescopes.

这些尘埃与氢气云都位在一个大分子云的边缘，而它们本身也是恒星诞生区的标志，不过对光学望远镜观测来说，它们也是遮掩新生恒星和原恒星的障碍。

The result is a detailed description of the formation of a protostar -- the early stage of a massive primordial star of our universe -- and the researchers' computer simulation, which has been called a "cosmic Rosetta Stone," sets the bar for further investigation into the star formation process.

这篇文章详细描述了原恒星的形成过程——它们是宇宙中大质量原始恒星的早期状态，他们称之为&宇宙罗塞塔石碑&的计算机模拟程序目的是要对恒星的形成过程做深入研究。

Dr. Yoshida's simulation also shows that the protostar would likely evolve into a massive star capable of synthesizing heavy elements, not just in later generations of stars, but soon after the Big Bang.

另外，Yoshida博士的模拟也揭示了原恒星演化成大质量恒星的可能性，在大质量恒星中一些较重的元素得以合成，模拟背景不是原恒星的后续演化，而是在大爆炸之后。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。