其他六个产生于又远出5000多倍的奥尔特星云。
The other six hail from the Oort Cloud more than 5, 000 times farther out.
通常来说，彗星来自距离遥远且冰天雪地的柯伊伯带和奥尔特星云然后掉入太阳系中的内层区域。
Normal comets fall into the inner regions of the solar system from icy reservoirs in the distant Kuiper belt and Oort cloud.
他们的理论是，这颗星星的轨道每隔2600万年都会进入奥尔特星云所在的区域，从而激发该处的彗星冲击到地球上。
Their theory was that the orbit of this star every 26 million years moved into an area called the Oort cloud and dislodged comets that then pounded the earth.
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