gemini 1
双子座(1
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Also known as Abell 21, this Medusa is an old planetary nebula some 1, 500 light-years away in the constellation Gemini.
也被称作阿贝尔21，水母星云是双子座中一个1500光年远的年老行星状星云。
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Gemini's 8.1-metre mirrors are thin and floppy.
ECONOMIST: Beneath the Southern Cross I stand | The
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