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.
灶神星和许多更小的小行星共同具有这种特征谱。这些更小行星的轨道表明它们是那次碰撞中剥落下来的，而其中大约5%的陨石落到了地球上。
It shares this with a number of smaller asteroids whose orbits suggest they were spalled off in the collision, and with about 5% of the meteorites which fall to Earth.
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