Or, rather, almost endlessly. For the hypothesis of Dr Jutzi and Dr Asphaug is that a largemoonlet did eventually catch up and collide with the proto-moonat a relatively low speedgiven that they shared an orbitand produced the highlands on its far side as a result.
或者,更确切些,几乎是没有休止的。因为彻奇希博士和阿萨福格博士的假说就是一个大的小卫星最终赶了上来并与这个原月发生了碰撞---考虑到它们共享一条轨道,是以相对低的速度碰撞---结果,就在月球较远的那侧产生了那些群山。
To test their theory, the two researchers simulated such a collision on a computer. They foundthat, assuming the second moon was indeed smaller than the main one, and was made ofsimilar stuff , then a comparatively low-speed collision at around 2.4 kilometres asecond would mean that much more material from the moonlet was deposited on the lunarsurface than was blasted off by the impact. Most of the excess rock, moreover, would havestayed near the point of impact, covering about half of the moon with a thicker,mountainous layer of crustjust what is seen on the real moon.
为了测试他们的理论,这两位研究者在计算机上模拟了这样一次大碰撞。他们发现,假设第二个月球确实比最大的月球要小,并且由相似的物质组成。然后,以大约每秒2.4公里的相对低速碰撞意味着,小卫星上更多的物质被沉积在月球表面而不是因碰撞而喷射出来。此外,过多的岩石将留落在碰撞点附近,且以更厚、多山的外壳层占了月球约为一半的面积 ---正如真正月球上所见到的一样。
【2015考研英语阅读月球的历史】相关文章:
最新
2016-10-18
2016-10-11
2016-10-11
2016-10-08
2016-09-30
2016-09-30