问:什么叫同步卫星?同步卫星在空中为什么不会掉下来?它能在天上坚持多久?里面有人吗?它靠什么补充能量?怎样使它做到与地球同步?(初二学生)答:同步卫星是指定位于赤道上空一定高度上绕地球做圆周运动、且其运动周期和角速度都与地球自转周期和角速度相等的航天器。同步卫星的 Q: What is a geostationary satellite, why does the geostationary satellite not fall in the air, how long does it stay in the sky, is there someone inside, what is it relying on to supplement energy, and how does it synchronize with the earth? (Grade 2) Answer: Synchronous satellites are spacecraft that are designed to orbit around the earth at a certain height above the equator, and that their motion cycle and angular velocity are equal to the Earth’s rotation cycle and angular velocity. Synchronous satellite