The formation of the satellite systems of the giant planets parallels in many respects the formation of the planets . 大行星的卫星系统的形成在许多方面相似于行星的形成。
This is found by observing the doppler shift in the frequency of the radio signals broadcast from the satellite . 这是通过观测卫星所发射的无线电信号频率中多普勒偏移来确定的。
In comparison with the classical lunar theory the motion of an earth satellite offers important practical differences . 与经典的月球理论相比较，地球卫星的运动有显著的实际差别。
We can perhaps forgive those who said the moons of jupiter were produced by galileo's spy-glass . 那么对于那些把木星的卫星说成是伽利略的小望远镜的产物的人们，我们或许是能够原谅的。
Comment on the relation between this period and the period of a satellite revolving close to the surface of the earth . 解释这个周期和卫星沿接近地球表面的轨道旋转的周期之间的关系。
Another test, involving the precession of a gyroscope in a satellite circling the earth, is scheduled for the 1970s . 七十年代还安排了另一实验，它包括绕地球旋转的卫星中的陀螺进动性试验。
In addition to helping us learn more about saturn's moons, voyager added to our knowledge of saturn's rings . 旅行者除了帮助我们增进对土星的卫星了解外，还使我们丰富了有关土星光环的知识。
For other parts of the spectrum, such as the ultraviolet, satellites are necessary to see what objects in space are doing . 对波谱的另外一些部分，如紫外辐射，必须利用卫星才能知道是宇宙中什么天体产生的。
The analysis of lunar rocks and soil samples has led to a number of tentative conclusions about the past history of our satellite . 对月球岩和土壤样品进行分析，可得出有关我们的这颗卫星过去历史的一些初步的结论。
Generally, satellite relay stations receive electromagnetic waves from one part of the earth and then transmit them to another part of the earth . 卫星中继站通常从地球的一个地区接收无线电波，然后再把它们传送到另一个地区去。
