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微透镜的突破！科学家首次在银河系外发现行星
source link: http://tech.sina.com.cn/d/s/2018-02-04/doc-ifyremfz4470059.shtml
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来源：快科技天体物理学家首次在银河系外发现了一群行星。这一令人难以置信的发现是通过一种叫做微透镜的技术实现的，这使得研究人员可以在银河系外的星系中发现一些天体，而这些天体离我们太远，无法被直接观测到。研究结果表明，每颗主恒星大约有2000颗
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