They were by far，the largest and most distant objects that scientists had ever detected:a strip of enormous cosmic clouds some 15 billion lightyears from earth.
离地球大约150亿光年的一块狭长的巨大宇宙云系是科学家在此以前所发现的最大、最遥远的物体。
They were by far，the largest and most distant objects that scientists had ever detected:a strip of enormous cosmic clouds some 15 billion lightyears from earth.
离地球大约150亿光年的一块狭长的巨大宇宙云系是科学家在此以前所发现的最大、最遥远的物体。
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