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。

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The space station is in no danger of entering the main debris clouds because it is orbiting just 220 miles above Earth, or 271 miles below the orbit of the collision.

由于国际空间站距离地面只有220英里，且位于卫星相撞轨道下方271英里处，因此主碎片云进入国际空间站的机率很小。

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One planet, about the size of Mars, probably had an orbit which crosses Earth's, and eventually a collision occurred.

一个大小与火星相当，轨道可能与地球轨道交叉的行星，最终与地球发生了碰撞。

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Before the collision, Iridium had a group of sixty-six satellites in orbit.

VOA: special.2009.04.01

The collision changed the orientation and orbit of the Russian satellite, which was being used in scientific experiments, Kelso said.

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It holds that the Moon formed from the debris kicked into orbit by the collision of a smaller proto-planet with the infant Earth.

BBC: Moon formation: New spins put on old questions

The debris could shatter into more pieces or change orbit and be on a collision course with something else.

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