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。
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。
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。
Astronomers have studied the planets and other objects in space for thousands of years.
天文学家已经研究行星和太空中的其它天体数千年了。
Astronomers have studied the planets and other objects in space for thousands of years. Astronomy is a very complicated science.
天文学家已经研究行星和太空中的其它天体数千年了。天文学是一个非常复杂的学科。
Astronomers have studied the planets and other objects in space for thousands of years. Astronomy is a very complicated science.
天文学家已经研究行星和太空中的其它天体数千年了。天文学是一个非常复杂的学科。
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