Astronomers studied the supernova using the Chandra X-ray space telescope launched by the American space agency Nasa in 1999.

天文学家利用钱德拉x光线太空望远镜研究这颗超新星。钱德拉x光线太空望远镜是1999年由美国空间管理机构Nasa发射的。

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Astronomers studied NGC6240 because it produced unexplained bursts of X-rays that appeared to come from one of two nuclei at the galactic center.

天文学家之所以研究NGC6240，是因为发现该星系中心有两个核，此中一个不竭爆发出难以解释的X线。

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NGC 6334 is one of the most active nurseries of massive stars in our galaxy and has been extensively studied by astronomers.

NGC 6334是银河系中最活跃的恒星保育院之一，被天文学家广泛研究。

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Some astronomers seemed to think that he and his colleagues had been too selective about the sample of comets they studied.

ECONOMIST: X marks the spot