天体的

The study of the mathematical model for such motion is called celestial mechanics , and involves a finite number of bodies moving under the effects of gravitational attraction given by the Newtonian laws.

对于这种运动的数学模型的研究称作天体力学，包括研究在牛顿万有引力定律作用下的有限个天体的运动。

We sustain that the peak frequency can become a well classificatory criteria of BL Lac objects and conceive that there are some systemic difference between XBLs and RBLs, and the difference is not only the result of choice.

作者在相关领域作的一些研究工作，我们的工作进一步支持了峰频作为BL Lac天体的一个有效的分类标准的观点，进一步猜想BL Lac天体的两个子类XBL和RBL的物理性质可能存在本质差异，而不仅是选择效应的结果。

"This new discovery fits right in with our expectation that there should be a handful or two of objects as large as Pluto," said astronomer David Jewitt of the University of Hawaii. Jewitt, with then-colleague Jane Luu, discovered the first Kuiper Belt object just a decade ago.

"这一发现印证了在柯依伯带中应该有2个到10个左右的冥王星大小的天体的预言，"夏威夷的天文学家大卫杰维特说，他和他的同事简路10年前发现了第一个柯依伯带天体。

Special discussion and probe are placed on the object AO 0235+ 164, as a member of BL Lacertae, whose radio structrue and some special physical properties, including VLBI observation and data post processing, periodic variation of the jet positional angle, superluminal montion and the mass of the central engine are studied and discussed.

着重探讨了作为BL Lacertae型天体的一员，AO 0235+164的射电结构及其一些特殊的物理性质，包括VLBI观测和数据的后处理、喷流位置角的周期性变化、视超光速运动和中心天体质量的估算。

Receiving, the radio waves from celestial observation equipment, which can be used to determine the strength of celestial radio, radio source location, size, the polarization of the radio emission and spectrum, etc..

接收、观测来自天体的射电波的设备，它可用来测定天体射电的强度，射电源的位置、大小，射电辐射的偏振和频谱等等。

If your new object can be matched to an earlier designated one-night stand (generally this will be a redesignation from a published two-night object), your new object will also have priority.

如果你新发现的目标正好和以前的一个已经给了临时编号的单晚的观测吻合（一般地该天体的临时编号将重新定义），那么你也将获得该天体的发现权。

That it was a Utopia, there being no known method from the known to the unknown: an infinity renderable equally finite by the suppositious apposition of one or more bodies equally of the same and of different magnitudes: a mobility of illusory forms immobilised in space, remobilised in air: a past which possibly had ceased to exist as a present before its probable spectators had entered actual present existence.

那是无限的。假定各个天体有可能并存，那么也能把它看作是有限的。天体的数目是一个还是一个以上都无所谓，体积相同或不同也无所谓。那是一团能活动的幻觉形态，是在空间里已固定下来的东西，借着空气又重新活动起来。它是过去，未来的观察者们作为现在实际存在之前，它或许已不再作为现在而存在了。

In the given dynamical models, all the possible dynamical factors which affect the movements of the NEAs are taken into account, including the gravitation of major planets and larger minor planets in the main belt area, the effects of the body flattening and the post-Newtonian influence from the sun's gravitation.

在给出的力学模型中，考虑了所有可能影响近地小行星运动的力学因素，包括各大天体和较大的主带小行星的引力作用、有关天体的扁率影响以及源于太阳引力的后牛顿效应。

A computer simulation shows the evolution of a molecular cloud with a solar mass of 10^4 falling toward a supermassive black hole with a solar mass of 10^6. Here, the cloud is within 0.5 parsecs of the black hole. Color scale is from 0.1 g cm^-2 to 1000 g cm^-2. A small population of stars is being ejected from the system in the this image.

据美国生活科学网站21日报道，银河系中央潜伏着一个巨大的黑洞，身处黑洞附近的天体都会逐渐地被黑洞吞噬，并最终消失地无影无踪，也就是说在理论上黑洞附近是不可能存在任何天体的。

To this end a dedicated aviation sextant, nautical sextant with the greatest difference is observed celestial bodies do not use water as the height of the antenna base 768 ideas and Academic quasi-plane, but the use of bubbles, liquid pendulum, single gyro vertical instrument, the level of instrument gyroscope devices such as Zaochu artificial horizon, and use it as the base plane of the horizon height measurement of celestial bodies.

为此有专用的航空六分仪，与航海六分仪的最大区别是不用水天线作为观测天体高度的基768思想与学术准平面，而是利用气泡、液体摆、单陀螺垂直仪、陀螺水平仪等装置造出人工地平，并以此为基准平面测量天体的地平高度。

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