根据“巨型撞击假说”，月球是在地球和一个火星大小的物体相撞时形成的。
According to the giant-impact hypothesis, the Moon was created during a collision between Earth and a large object about the size of Mars.
一个起源假说是当撞击发生时，此处并没有被水星表面的物质所覆盖保护著。
One origin hypothesis is that the dark material was uncovered from beneath Mercury's surface during the impact that created the surrounding crater.
一个起源假说是当撞击发生时，此处并没有被水星表面的物质所覆盖保护著。
One origin hypothesis is that the dark material was uncovered from beneath Mercury's surface during the impact that created the surrounding crater.
应用推荐