在每个轨道内，天体之间的碰撞产生了巨大的热量和能量。
Within each orbit, collisions between planetesimals generated immense heat and energy.
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。
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.
在这种情况下，每一次碰撞会产生新的碎片，引发更多产生碎片的碰撞，直到低地球轨道出现无可救药的堵塞，航天器甚至卫星均无法使用。
In that scenario, each collision would generate new debris, causing more debris-generating collisions, until low Earth orbit becomes hopelessly clogged and unusable by spacecraft or even satellites.
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