每当夜晚降临,抬头仰望星空。我们会看见在浩瀚的星海,有数不清的星体在运动,遵循着各自的规律,在各自的轨道上运行。其中就有高中物理习题中最常见的:近地卫星,同步卫星和双星。一、近地卫星通常把高度在500千米以下的航天器轨道称为低轨道, Whenever night falls, look up at the sky. We will see in the vast sea of ​​Xinghai, countless stars in motion, follow their own laws, in their own orbit. Among them are the most common high school physics exercises: near-Earth satellites, geostationary satellites and binary stars. First, NEOs generally refer to spacecraft orbits below 500 kilometers as low orbits,