亚特兰蒂斯号沿着向东北方向的轨迹，加速飞入多云的天空，沿着预订轨道在星期三下午与国际空间站对接。
Wheeling about to line up on a northeasterly trajectory, Atlantis accelerated through a partly cloudy sky, on course for a docking with the space station around noon Wednesday.
接着开普勒证明了这个椭圆轨道也能很有效解释其他行星的运行轨迹。然后他提出了行星运动定律，牛顿定律就是以此为理论基础的。
Kepler went on to show that an elliptical orbit is sufficient to explain the movement of the other planets and to devise the laws of planetary motion that Newton built on.
这个新模型追踪了海王星轨道外数无数个微小物体的运行轨迹，它可以帮助天文学家计算出其他星系尘埃盘中行星的特性。
The new model, which tracks thousands of tiny particles beyond the orbit of Neptune, could help astronomers work out the properties of planets in other stars' dust disks.
太阳一年内的轨迹形成这种形状是因为地球围绕着与太阳略微不同的轴旋转，而我们的地球也沿着椭圆形轨道运行。
The sun makes this shape over a year because Earth rotates on a slightly different axis than the sun, and our planet also travels on an elliptical orbit.
艾萨克·牛顿在其后发现彗星沿椭圆轨迹移动，处于环绕太阳的椭圆形轨道上，他还准确地预测了彗星能够一次又一次地回归。
Isaac Newton later discovered that comets move in elliptical, oval-shaped orbits around the Sun, and correctly predicted that they could return again and again.
在钻井轨道设计、井间防碰计算、实钻轨迹监控等问题中，邻井之间的最近距离计算有很重要的意义。
Calculation of the nearest distance among adjacent Wells is very important in drilling trajectory design, interwell anti-collision calculation, and actual wellbore trajectory control.
为了以防万一，告诉我火箭的轨道轨迹。我不想在它飞过的地方住。
Tell me it's orbit? trajectory and I won't live in those locations, just in case.
在拉格朗日坐标系下，用随机轨道法跟踪颗粒的轨迹。
Under a Lagrange coordinate system the trajectory of particles was tracked by the use of a random orbital method.
针对圆(近圆)轨道航天器相对运动的固定时间状态转移问题，提出了一种基于导航点的多脉冲优化轨迹生成策略。
An optimal trajectory generation strategy based on way-points is presented to solve the fixed-time state transition for spacecraft relative motion in a circular orbit.
井眼轨迹控制是侧钻水平井技术的核心，而轨道设计与优化设计又是轨道控制技术的两大关键技术之一。
The control of the trajectory is the core technique in horizontal well technique, while trajectory design and optimal design are the two key techniques.
极地轨道气象卫星以大致南北方向环绕地球运行。它的轨迹离地面约数百公里。
Polar-orbiting satellites are low-flying satellites circling the earth in a nearly north-south orbit, at several hundred kilometers above the earth.
在定向井轨道设计、实钻轨迹监控等一系列问题中，圆弧井段参数计算是一个最基础的问题。
Circular arc well section parameter calculation is the most primary question among a series of questions of directional orbit design and actual surveyed trajectory.
以轨道半径和轨道倾角为未知量依据星下点轨迹要求条件构建了非线性方程组，但直接求解过于复杂，采取迭代的方法解决。
Non-linear equations are(constructed) with the restriction of the satellite ground trace to resolve the unknown semi-axis and inclination, but it's too complicated to be resolved directly.
其实，通过轨道数据计算出来的卫星轨迹，要比通过几周前的数据计算所得更不准确。
A satellite prediction calculated from orbital data more than a few weeks old will generally be virtually meaningless.
另外，本文用颗粒轨道模型计算了进入水力旋流器的油滴颗粒运动轨迹，在此基础上，得出了水力旋流器的分离效率曲线。
In addition, the trajectories of oil droplets entering the hydrocyclone were computed by using the particle obit model. Thereby the separation efficiency of the hydrocyclone can be obtained.
阐述了基本轨道应用分析理论，包括星下点轨迹计算、可见性分析、覆盖评估和轨道寿命估算。
Expatiated on the application theory of basic orbit, including subastral point calculation, visibility analysis, coverage evaluating and spacecraft life-span estimate.
仿真了各种不同轨道根数下的相对运动轨迹，与定性的理论分析进行比较，说明了轨道根数描述方法的优越性。
Simulation of the relative trajectories with various orbital elements and a qualitative theoretical analysis illustrate the advantages of the orbital elements method.
该井井眼轨道优化设计和井眼轨迹控制技术为类似水平井的井眼轨道设计和轨迹控制提供了有益的借鉴。
The well path optimization and control technology applied to this well can supply valuable references to similar horizontal wells.
绕小行星运行的航天器由于受到摄动力的影响，运行轨迹会偏离二体假设下的圆锥曲线轨道。
Due to the dragging force, trajectories of spacecraft circling planetoid can departure from the standard taper curve orbit which is obtained by the two-body hypothesis.
随着一声雷鸣般的巨响，火箭拖着一道火焰轨迹冲向蓝天。当火箭驶入轨道时，旁观者都拍手喝彩。
With a roar and thundering sound, the rocket left a trail of fire as it reached into the blue sky. Onlookers applauded when the rocket finally reached orbit.
在数值预测时，气相场采用雷诺应力输运模型，应用随机轨道模型来模拟湍流流场中颗粒的运动轨迹。
The gas flow fields were simulated by a Reynold's stress Transport Model(RSTM) and the stochastic tracking approach was used for simulating the trajectories of particles in a turbulent current.
轨道维持的任务是将卫星的星下点轨迹保持在设计的参考轨迹附近。
The ground tracks of satellites required for mission should be maintained close to those of reference orbits over the lifetime of satellites.
确定了近地轨道的发射轨道优化设计方法 ，采用多重参数化法将轨迹最优控制问题转化为参数优化问题。
The optimization methods for launch trajectory of low earth orbit are discussed, and the optimal control problems are converted into parameter optimization problems by multiple parameterized methods.
因此快速生成最优轨迹对保障亚轨道飞行器任务的完成至关重要。
Therefore, it is very important for its mission completion to generate an optimal trajectory.
现在，该小组展示了这些轨迹变动在少数情况下会如何加大，几百万年后，内侧行星的轨道如何开始重叠。
Now, the team has shown how in a small proportion of cases these fluctuations can grow until after several million years, the orbits of the inner planets begin to overlap.
这种方法可直接获得向径、轨道速度等参数随时间或极角（绕地心的转动角）的变化，便于分析轨道转移与逃逸运动，有助于飞行使命与运动轨迹的设计。
Radius and orbital velocities can be directly expressed as functions of time or polar angle, which is helpful for designing flight mission and motion trajectory.
循规蹈矩。坚持进入正常的轨道路线，保持不偏离轨迹。千万别去冒险尝试那些新鲜玩意儿。
Do the same things. Get into a regular routine and do not diverge from it. Don't try anything new or adventurous.
这些轨迹被完美的制作出来，似乎是被故意设计成使其能在环绕地球轨道上被观测到。
The tracks are perfectly executed, and they seem to be designed to be seen from orbit.
这些轨迹被完美的制作出来，似乎是被故意设计成使其能在环绕地球轨道上被观测到。
The tracks are perfectly executed, and they seem to be designed to be seen from orbit.
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