The debris now circles the Earth in orbits from two hundred kilometers to over three thousand eight hundred kilometers.

VOA: special.2009.04.01

It doesn't simply orbit the nucleus, but as it orbits it spins.

它并不只是简单地绕原子核旋转，而是同时进行公转和自旋。

麻省理工公开课 - 固态化学导论课程节选

Hubble orbits about six hundred kilometers above the Earth's surface.

VOA: special.2009.09.30