Astronomers have detected an asteroid not far from Earth, moving in the same orbit around the Sun.
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它们是迄今为止科学家探测到的最大、最遥远的物体：一条巨大的宇宙云带，距离地球约150亿光年。
They were, by far, the largest and most distant objects that scientists had ever detected: a strip of enormous cosmic clouds some 15 billion light-years from earth.
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你可以近距离地观看飞机起飞或降落。
You can watch aircraft take off or land at close quarters.
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