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*discount only applies to the first year

ScienceCcast:哈勃太空望遠鏡上的手印

在庆祝哈勃太空望远镜成立 25 周年之际,科学家们在反思宇航员是否可以再使用望远镜做更大的探勘并发挥关键作用。 访问 http://science.nasa.gov/ 了解更多信息。 点击这里查看更多视频:https://alugha.com/NASA 视频于2015年制作

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