The shape of this orbit isn't consistent; it varies over time, over a period of about a thousand years.
轨道的形状并不是始终如一的；它会随时间变化，变化周期为一百年左右。
And out of this information you get the radius, the velocity and the period, assuming that you are on Earth in the plane of the orbit of the stars.
除了这个，还能得到半径的大小，速度以及周期，假设你在地球上，和这些恒星环绕的，轨道同处一个平面。
That means you can get the speed of the neutron star, you can get the radius of the orbit, and you can get the period, just like we discussed before.
中子星的速率,得到轨道的半径，得到周期的大小，如之前讨论过的那样，现在取一个光学的。
The habitable zone for planets in orbit around cool dwarf stars is also much closer in, so the period of revolution is shorter — affording astronomers more frequent transits to observe.
行星在冷矮星上的轨道距冷矮星更近，因此运行周期也就更短---这就需要天文学家频繁的观察。
- not the radius of the donor — you know the radius of the orbit, and you know the period.
而是轨道的半径-，你知道了周期，现在情况是。
Space probes parked in orbit round the sun might lie dormant yet intact for an immense period of time.
停在太阳周围轨道的太空探测器也许依然完好。
During this period of irregularity, which may have lasted millions of years, any rocky inner world sitting in the path of the hot Jupiter and its new orbit would have been obliterated.
这种不规则的时期可能已经持续了几百万年，在此期间，位于热木星原有轨道以及新轨道上的任何系内的岩石行星都有可能已遭毁灭。
So, in principle, you can determine for each one of those stars the velocity in orbit, the radius of their orbit and, of course, the period of the binary system.
所以从原则上来说，你们可以决定任何,恒星在轨道中的速度，轨道的半径以及，当然，二元体系的周期。
The red circle is the orbit of a long period object like a comet. Note the object and its tail.
红色的圈是一个类似彗星的长周期天体的轨道，注意一下这个天体和它的尾巴。
This constant is very important because it fixes the sizes, period and energy of an electron's orbit in an atom.
这一常量非常重要，因为它确定了一个原子中的一个电子轨道的大小，周期和能量。
The proposed method can effectively control the ferroresonance over voltage from the chaos to period orbit and implement the transformation of system status between chaotic and ordered situation.
该方法能有效控制铁磁谐振过电压从混沌状态转移到期望的周期轨道，实现系统状态在混沌和有序之间的转换。
The variations of velocity difference have obvious periodicity, which coincides with the satellite orbit period.
速度差各分量的变化具有很明显的周期性且与卫星轨道的运行周期相吻合。
The key points of the design under the restrained conditions, such as orbit node period, regressive cycles, regressive period, repeat period and others, were also presented.
并给出了在轨道交点周期、回归圈数、回归周期、重复周期和其他因素等约束条件下的轨道设计要点。
The satellite itself will orbit around the earth for a period of days.
卫星本身将绕地球轨道运行一段时间。
Global coverage and sun synchronization are the essential properties of the earth observation satellites, which are assumed by designing the orbit period and inclination.
对地观测卫星轨道具有全球目标覆盖和太阳同步两种特性，通过设计轨道周期和轨道倾角可以获得这些特性。
The former correct for the varying time-delays by using an approximation of the binary orbit which is valid only if the observation time is much less than the orbital period of the binary system.
前一种通过近似的双星轨道对时间延迟进行修正，只在观测时间远小于双星系统的轨道周期时才有效。
Particularly, the method of coverage orbit design is given in view of the orbital period deviation, which is based on recursive orbit.
特别是，以循环轨道为基础，考虑轨道周期的误差，给出覆盖轨道的设计方法。
This spent rocket body was last seen in an Earth orbit with a period of 43 days, not much different from J002E3's current orbit.
这度过火箭身体最后在一地球轨道与的时间43天一起内看见，不非常不同于J 002e3的当今的轨道。
Our satellite itself will orbit around the moon for a period of two days.
我们的人造卫星本身将绕月球运行两天的时间。
The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.
第三定律（周期定律）：各个行星绕太阳公转周期的平方和它们的椭圆轨道的半长轴的立方成正比。
Under the control of net being under construction specifically for city orbit traffic GPS, necessity having suggested that under the control of net checks in the period being under construction.
针对城市轨道交通GPS施工控制网，在施工期间提出了控制网检测的必要性。
Rotation is likely to return to a 24 hour day, or close to this, and the Earth's orbit close to her prior period of 365 days in a year.
旋转很可能会恢复到一天24小时，或是接近这个数，而且地球的轨道也接近于之前的1年365天。
It is said that it needs a period of 60 years for such a wonderful scene showing itself, due to the Angle formed by the sun, moon and earth's orbit.
据说，由于地球、月亮、太阳运转的角度关系，这样的奇景，要60年才能出现一次。
However, because of the elliptical orbits of planets, this time period is not equal to an exact 5 calendar years, which is based upon the Earth's orbit around the Sun.
然而，因为行星的椭圆轨道，这一个次时期对精确的5日历数年不是相等的，在太阳的周围基于地球的轨道。
A new satellite is travelling 1.5 million kilometers over a 110-day period to enter an orbit of the sun.
一颗新卫星将用110天时间行程150万公里进入某个太阳轨道。
A new satellite is travelling 1.5 million kilometers over a 110-day period to enter an orbit of the sun.
一颗新卫星将用110天时间行程150万公里进入某个太阳轨道。
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