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宇航员利用世界上最大的X射线和光学望远镜发现了一个离地球90亿光年远的星系群,这是迄今为止发现的离地球最远的大型天体。科学家为宇宙早期就存在这样一个庞大的星系群而感到非常惊讶,因为此前他们认为,这样复杂结构的星系群只有当宇宙步入较晚的阶段才会产生。
Astronauts used the world’s largest X-ray and optical telescope to discover a galaxy cluster 9 billion light-years away from Earth. This is the largest object ever found farthest from Earth. Scientists were surprised by the existence of such a huge galaxy cluster in the early days of the universe because they thought that such a complex structure of galaxy clusters would only occur when the universe entered a later stage.