Using the light from 1, 857 stars, a team of French and American astronomers were able to measure the density of the gas surrounding our sun by examining fine differences in the starlight.
利用1857颗恒星的光线，一个由来自法国和美国天文学家组成的研究小组通过测量星光之间的细微差距来测定太阳周围气体的密度。
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 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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