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首次测出河外星系的距离，从而肯定河外星系存在的天文学家是

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首次测出河外星系的距离，从而肯定河外星系存在的天文学家是

A.乔治·黑尔

B.爱德华·皮克林

C.亨利埃塔·李维特

D.埃德温·哈勃

参考答案:

答案：埃德温·哈勃

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