Having your personal satellite launched into orbit might sound like an idea straight out of science fiction.
把你的个人卫星发射到轨道上，可能听起来像是科幻小说里的情节。
2
One problem with the collision hypothesis is the question of how a satellite formed in this way could have settled into the nearly circular orbit that the Moon has today.
碰撞假说的一个问题是，以这种方式形成的卫星是如何在月球现在的近乎圆形的轨道上运行的。
3
Earth is the only one of the inner planets with a large satellite, the orbitof which is neither in the equatorial plane of Earth nor in the plane in which the other planets lie.