超大碰撞可能剥去了水星的一部分岩石地幔，留下了一个金属核心，其密度与原来的岩石与金属的比例相比大得不成比例。
A titanic impact could have stripped away a portion of its rocky mantle, leaving behind a metallic core whose density is out of proportion with the original ratio of rock to metal.
红巨星内部的对流碰撞出新的原始尘埃原子会从其核心撞到表面。
Convection within the red giant dredges the new proto-dust atoms from the core up to the surface.
对遥远的星系团碰撞进行观察后，发现了一个不可见物质的核心，然而其中没有星光闪烁的星系，这用目前的理论是难以解释的。
Observations of a distant galaxy cluster collision reveal a core of invisible matter devoid of glittering galaxies-something that is hard to explain by current theories.
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