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- orbit of celestial body motion 天体运行轨道
- The point on the orbit of a celestial body that is farthest from the sun. 远日点在天体运行轨道上距离太阳最远的点
- The point nearest the sun in the orbit of a planet or other celestial body. 近日点绕日运行的行星或其它天体的椭圆轨道上离太阳最近的一点
- The geology of celestial bodies. 天体地质学有关天体研究的地质学
- The point of greatest or least distance of the orbit of a celestial body from a center of attraction. 离吸引中心最远或最近距离的点。
- The orbit of a celestial body. 天体的轨道
- The branch of astronomy that deals with the measurement of the position and motion of celestial bodies. 天文学中有关天体位置与运动的测量的分支。
- The scientific study of matter in outer space, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of celestial bodies and phenomena. 天文学外层空间事物的科学研究，尤指天体及天文现象的位置、大小、分布、运动、构成、能量及演化的科学
- The scientific study of matter in outer space,especially the positions,dimensions,distribution,motion,composition,energy,and evolution of celestial bodies and phenomena. 天文学外层空间事物的科学研究，尤指天体及天文现象的位置、大小、分布、运动、构成、能量及演化的科学。
- An early instrument for measuring altitude of celestial bodies, consisting of a90= graduated arc with a movable radius for measuring angles. 象限仪用来测量天体纬度的一种早期工具，由一个有90度刻度的圆弧和一个用来测量角度的可移动的半径构成
- Introduction on background medium theory about celestial body motion orbit and foundation of fractional-dimension calculus about self-fractal measure calculation 天体运行轨道的背景介质理论导引与自相似分形测度计算的分维微积分基础
- A body subjected to gravitational attraction by the Earth and orbiting the latter according to the law of celestial mechanics must be termed a "celestial body". 一个受到地球引力吸引，并按照天体力学定律环绕地球运转的物体必须叫做“天体”。
- The scientific measurement of the positions and motions of celestial bodies. 天体测量学天体位置及运动的科学测量
- In the design and computation of orbit of Saturnian explorer, the author fully utilizes the gravitational force of some celestial bodies, thus reducing greatly the launching conditions. 在土星探测器的轨道设计和计算中 ,充分利用了有关天体的引力机动 ,有目的地使探测器飞过一系列行星来增加探测器的能量 ,从而大大降低了探测器的发射条件。
- Astronomy: The scientific study of matter in outer space, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of celestial bodies and phenomena. 天文学外层空间事物的科学研究,尤指天体及天文现象的位置、大小、分布、运动、构成、能量及演化的科学。
- Disappear beyond the horizon,of celestial bodies such as the sun and the moon. 在地平线以下消失,指太阳和月亮等天体。
- Marketing does not come within the orbit of his department. 市场推销业务不归他这一部门管。
- By means of the Lagrange Multiplier, this paper points out the position of celestial bodies when their azimuth varies the slowest during diurnal motion, thus consummating the conclusion concerned. 用拉格朗日乘数法确定天体周日视运动过程中方位变化速度最慢点的位置，从而使有关结论完整化。
- Three Confusable Models in Celestial Bodies Motion 天体运动中三个易混淆的模型
- move backward in an orbit, of celestial bodies. 指天体在轨道上向后退。
