Hubble was able to resolve six variable stars in M31.
哈勃望远镜能分辨梅西叶星云星团表31中的六颗变星。
Hubble was able to resolve six variable stars in M31.
哈勃望远镜能分辨梅西叶星云星团表31中的六颗变星。
Two spacewalking astronauts have been able to install a new camera in the Hubble Space Telescope.
两名太空行走的宇航员已经可以给哈勃望远镜安装新摄。
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