Like humans, killer whales have colonized a range of different habitats across the globe, occupying every ocean basin on the planet, with an empire that extends from pole to pole.
像人类一样，虎鲸也在全球范围内开拓了一系列不同的栖息地，占据了地球上的每一个海洋流域，拥有一个从一极延伸到另一极的帝国。
A few additional observations and some number-crunching later, astronomers noted that the chance of the planet-killer hitting Earth in 2029 was nearly zilch.
但是经过更多的观察和一数字演算之后，天文学家注意到这个行星在2029年撞击地球的可能性微乎其微。
These abilities are key to discovering not only killer space rocks but huge Numbers of much more common phenomena, from planet-size bodies in our solar system to far-flung cosmic cataclysms.
这些性能是观测的关键，不仅可以发现致命的太空陨石也可以发现庞大数量的更加普遍的天文现象，从我们太阳系行星大小的物体到广泛遥远的宇宙大爆发。
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